Marital and extra-marital live births by districts, municipalities and place of residence

Table

MARITAL AND EXTRA-MARITAL LIVE BIRTHS BY DISTRICTS, MUNICIPALITIES AND PLACE OF RESIDENCE IN 2024

(Number)
Districts Municipalities	Total			Urban residence			Rural residence
Districts Municipalities	Total	Marital	Extra- marital	Total	Marital	Extra- marital	Total	Marital	Extra- marital
Total	53 428	20 352	33 076	39 483	15 928	23 555	13 945	4 424	9 521
Blagoevgrad	2 303	1 127	1 176	1 432	708	724	871	419	452
Bansko	89	56	33	86	53	33	3	3	-
Belitsa	86	27	59	33	11	22	53	16	37
Blagoevgrad	569	264	305	522	244	278	47	20	27
Gotse Delchev	253	151	102	129	70	59	124	81	43
Garmen	160	58	102	-	-	-	160	58	102
Kresna	32	20	12	23	16	7	9	4	5
Petrich	385	185	200	260	121	139	125	64	61
Razlog	140	79	61	86	49	37	54	30	24
Sandanski	253	116	137	192	94	98	61	22	39
Satovcha	76	57	19	-	-	-	76	57	19
Simitli	96	45	51	46	22	24	50	23	27
Strumyani	45	6	39	-	-	-	45	6	39
Hadzhidimovo	50	34	16	14	5	9	36	29	7
Yakoruda	69	29	40	41	23	18	28	6	22
Burgas	3 037	1 356	1 681	2 239	990	1 249	798	366	432
Aytos	214	123	91	138	81	57	76	42	34
Burgas	1 499	665	834	1 460	648	812	39	17	22
Kameno	97	32	65	34	14	20	63	18	45
Karnobat	165	73	92	120	57	63	45	16	29
Malko Tarnovo	13	5	8	8	5	3	5	-	5
Nesebar	222	74	148	152	56	96	70	18	52
Pomorie	211	105	106	134	61	73	77	44	33
Primorsko	45	24	21	24	14	10	21	10	11
Ruen	210	147	63	-	-	-	210	147	63
Sozopol	85	30	55	30	12	18	55	18	37
Sredets	120	28	92	71	21	50	49	7	42
Sungurlare	96	31	65	22	6	16	74	25	49
Tsarevo	60	19	41	46	15	31	14	4	10
Varna	3 632	1 470	2 162	3 076	1 291	1 785	556	179	377
Avren	55	11	44	-	-	-	55	11	44
Aksakovo	163	69	94	91	34	57	72	35	37
Beloslav	65	27	38	47	16	31	18	11	7
Byala	21	9	12	12	..	..	9	..	..
Varna	2 688	1 170	1 518	2 622	1 151	1 471	66	19	47
Vetrino	37	12	25	-	-	-	37	12	25
Valchi Dol	53	12	41	14	..	..	39	..	..
Devnya	70	18	52	68	..	..	..	-	..
Dolni Chiflik	153	43	110	47	13	34	106	30	76
Dalgopol	100	36	64	48	13	35	52	23	29
Provadia	174	46	128	88	27	61	86	19	67
Suvorovo	53	17	36	39	13	26	14	4	10
Veliko Tarnovo	1 398	421	977	983	322	661	415	99	316
Veliko Tarnovo	568	213	355	501	195	306	67	18	49
Gorna Oryahovitsa	216	55	161	162	40	122	54	15	39
Elena	60	13	47	25	7	18	35	6	29
Zlataritsa	30	6	24	13	..	..	17	..	..
Lyaskovets	55	16	39	32	7	25	23	9	14
Pavlikeni	119	23	96	68	12	56	51	11	40
Polski Trambesh	86	21	65	26	9	17	60	12	48
Svishtov	155	50	105	110	38	72	45	12	33
Strazhitsa	91	21	70	36	9	27	55	12	43
Suhindol	18	3	15	10	..	..	8	..	..
Vidin	507	126	381	302	82	220	205	44	161
Belogradchik	45	7	38	39	..	..	6	..	..
Boynitsa	-	-	-	-	-	-	-	-	-
Bregovo	16	..	..	9	..	..	7	..	..
Vidin	277	83	194	224	69	155	53	14	39
Gramada	9	-	9	9	-	9	-	-	-
Dimovo	66	8	58	8	..	..	58	..	..
Kula	15	..	..	..	..	..	..	..	..
Makresh	6	-	6	-	-	-	6	-	6
Novo Selo	20	6	14	-	-	-	20	6	14
Ruzhintsi	36	8	28	-	-	-	36	8	28
Chuprene	17	7	10	-	-	-	17	7	10
Vratsa	1 233	276	957	671	176	495	562	100	462
Borovan	38	..	..	-	-	-	38	..	..
Byala Slatina	197	34	163	82	19	63	115	15	100
Vratsa	460	118	342	370	102	268	90	16	74
Kozloduy	179	42	137	93	30	63	86	12	74
Krivodol	72	12	60	16	..	..	56	..	..
Mezdra	105	26	79	44	9	35	61	17	44
Mizia	49	16	33	22	7	15	27	9	18
Oryahovo	67	14	53	30	5	25	37	9	28
Roman	35	..	..	14	..	..	21	..	..
Hayredin	31	8	23	-	-	-	31	8	23
Gabrovo	599	159	440	455	121	334	144	38	106
Gabrovo	293	83	210	257	71	186	36	12	24
Dryanovo	41	8	33	34	5	29	7	3	4
Sevlievo	213	54	159	115	31	84	98	23	75
Tryavna	52	14	38	49	14	35	3	-	3
Dobrich	993	346	647	639	233	406	354	113	241
Balchik	115	40	75	64	22	42	51	18	33
General Toshevo	64	19	45	36	14	22	28	5	23
Dobrich-selska	156	49	107	-	-	-	156	49	107
Dobrich	433	166	267	433	166	267	-	-	-
Kavarna	77	20	57	63	16	47	14	4	10
Krushari	29	4	25	-	-	-	29	4	25
Tervel	97	41	56	24	8	16	73	33	40
Shabla	22	7	15	19	7	12	3	-	3
Kardzhali	927	523	404	421	235	186	506	288	218
Ardino	39	23	16	11	..	..	28	..	..
Dzhebel	34	27	7	12	..	..	22	..	..
Kirkovo	124	62	62	-	-	-	124	62	62
Krumovgrad	147	58	89	33	16	17	114	42	72
Kardzhali	460	270	190	312	174	138	148	96	52
Momchilgrad	81	45	36	53	28	25	28	17	11
Chernoochene	42	38	4	-	-	-	42	38	4
Kyustendil	735	233	502	571	193	378	164	40	124
Bobovdol	36	9	27	26	..	..	10	..	..
Boboshevo	14	3	11	8	..	..	6	..	..
Dupnitsa	252	81	171	198	70	128	54	11	43
Kocherinovo	18	8	10	9	4	5	9	4	5
Kyustendil	338	104	234	284	92	192	54	12	42
Nevestino	7	..	..	-	-	-	7	..	..
Rila	20	9	11	15	..	..	5	..	..
Sapareva Banya	47	17	30	31	11	20	16	6	10
Treklyano	3	..	..	-	-	-	3	..	..
Lovech	955	184	771	562	113	449	393	71	322
Apriltsi	14	..	..	14	..	..	-	-	-
Letnitsa	32	6	26	28	..	..	4	..	..
Lovech	249	50	199	173	39	134	76	11	65
Lukovit	208	35	173	100	16	84	108	19	89
Teteven	145	26	119	67	8	59	78	18	60
Troyan	159	53	106	119	40	79	40	13	27
Ugarchin	64	6	58	36	3	33	28	3	25
Yablanitsa	84	6	78	25	..	..	59	..	..
Montana	870	270	600	508	176	332	362	94	268
Berkovitsa	112	36	76	90	26	64	22	10	12
Boychinovtsi	65	17	48	6	..	..	59	..	..
Brusartsi	38	8	30	5	..	..	33	..	..
Valchedram	80	23	57	21	4	17	59	19	40
Varshets	57	15	42	49	12	37	8	3	5
Georgi Damyanovo	8	..	..	-	-	-	8	..	..
Lom	126	50	76	99	45	54	27	5	22
Medkovets	30	6	24	-	-	-	30	6	24
Montana	307	101	206	234	85	149	73	16	57
Chiprovtsi	13	..	..	4	..	..	9	3	6
Yakimovo	34	8	26	-	-	-	34	8	26
Pazardzhik	1 943	592	1 351	1 202	378	824	741	214	527
Batak	33	18	15	13	..	..	20	..	..
Belovo	42	12	30	20	7	13	22	5	17
Bratsigovo	67	20	47	31	7	24	36	13	23
Velingrad	320	88	232	204	35	169	116	53	63
Lesichovo	43	8	35	-	-	-	43	8	35
Pazardzhik	722	226	496	420	163	257	302	63	239
Panagyurishte	147	50	97	114	41	73	33	9	24
Peshtera	140	35	105	130	..	..	10	..	..
Rakitovo	157	50	107	139	42	97	18	8	10
Septemvri	197	52	145	72	20	52	125	32	93
Strelcha	29	8	21	..	..	..	..	..	..
Sarnitsa	46	25	21	32	20	12	14	5	9
Pernik	674	216	458	556	176	380	118	40	78
Breznik	27	4	23	23	4	19	4	-	4
Zemen	10	..	..	7	..	..	3	-	3
Kovachevtsi	3	..	..	-	-	-	3	..	..
Pernik	504	177	327	418	144	274	86	33	53
Radomir	111	30	81	90	25	65	21	5	16
Tran	19	..	..	18	..	..	..	..	..
Pleven	1 704	462	1 242	1 002	341	661	702	121	581
Belene	37	10	27	29	..	..	8	..	..
Gulyantsi	53	12	41	29	5	24	24	7	17
Dolna Mitropolia	154	35	119	66	17	49	88	18	70
Dolni Dabnik	95	20	75	21	7	14	74	13	61
Iskar	47	11	36	21	7	14	26	4	22
Knezha	123	33	90	90	27	63	33	6	27
Levski	101	22	79	49	14	35	52	8	44
Nikopol	44	13	31	16	6	10	28	7	21
Pleven	812	259	553	571	221	350	241	38	203
Pordim	42	7	35	21	..	..	21	..	..
Cherven Bryag	196	40	156	89	24	65	107	16	91
Plovdiv	5 804	2 365	3 439	4 326	1 861	2 465	1 478	504	974
Asenovgrad	472	231	241	379	202	177	93	29	64
Brezovo	53	6	47	13	..	..	40	..	..
Kaloyanovo	93	33	60	-	-	-	93	33	60
Karlovo	377	85	292	157	49	108	220	36	184
Krichim	71	26	45	71	26	45	-	-	-
Kuklen	42	23	19	39	..	..	3	..	..
Laki	15	8	7	..	..	..	..	..	..
Maritsa	272	106	166	-	-	-	272	106	166
Perushtitsa	40	16	24	40	16	24	-	-	-
Plovdiv	3 096	1 337	1 759	3 096	1 337	1 759	-	-	-
Parvomay	175	71	104	89	38	51	86	33	53
Rakovski	285	112	173	160	67	93	125	45	80
Rodopi	272	147	125	-	-	-	272	147	125
Sadovo	170	48	122	35	11	24	135	37	98
Sopot	65	25	40	61	25	36	4	-	4
Stamboliyski	184	63	121	101	41	60	83	22	61
Saedinenie	61	15	46	36	10	26	25	5	20
Hisarya	61	13	48	36	10	26	25	3	22
Razgrad	642	324	318	314	151	163	328	173	155
Zavet	52	27	25	16	9	7	36	18	18
Isperih	126	70	56	53	26	27	73	44	29
Kubrat	84	44	40	32	13	19	52	31	21
Loznitsa	48	22	26	13	7	6	35	15	20
Razgrad	265	115	150	187	89	98	78	26	52
Samuil	45	30	15	-	-	-	45	30	15
Tsar Kaloyan	22	16	6	13	7	6	9	9	-
Ruse	1 277	493	784	1 008	386	622	269	107	162
Borovo	28	11	17	10	4	6	18	7	11
Byala	70	12	58	40	9	31	30	3	27
Vetovo	68	35	33	50	22	28	18	13	5
Dve Mogili	43	21	22	25	15	10	18	6	12
Ivanovo	34	11	23	-	-	-	34	11	23
Ruse	956	374	582	869	331	538	87	43	44
Slivo Pole	51	21	30	14	5	9	37	16	21
Tsenovo	27	8	19	-	-	-	27	8	19
Silistra	681	281	400	259	110	149	422	171	251
Alfatar	18	5	13	6	..	..	12	..	..
Glavinitsa	51	26	25	8	..	..	43	..	..
Dulovo	200	103	97	51	30	21	149	73	76
Kaynardzha	71	19	52	-	-	-	71	19	52
Silistra	225	80	145	138	51	87	87	29	58
Sitovo	30	12	18	-	-	-	30	12	18
Tutrakan	86	36	50	56	22	34	30	14	16
Sliven	2 117	482	1 635	1 229	348	881	888	134	754
Kotel	187	40	147	34	..	..	153	..	..
Nova Zagora	359	79	280	192	51	141	167	28	139
Sliven	1 316	345	971	809	269	540	507	76	431
Tvarditsa	255	18	237	194	..	..	61	..	..
Smolyan	479	147	332	292	83	209	187	64	123
Banite	8	..	..	-	-	-	8	..	..
Borino	10	..	..	-	-	-	10	..	..
Devin	41	15	26	27	10	17	14	5	9
Dospat	44	24	20	13	10	3	31	14	17
Zlatograd	48	25	23	28	13	15	20	12	8
Madan	54	8	46	23	-	23	31	8	23
Nedelino	17	7	10	14	..	..	3	..	..
Rudozem	42	17	25	17	5	12	25	12	13
Smolyan	183	43	140	142	35	107	41	8	33
Chepelare	32	4	28	28	..	..	4	..	..
Sofia (stolitsa)	12 025	5 586	6 439	11 589	5 387	6 202	436	199	237
Stolichna	12 025	5 586	6 439	11 589	5 387	6 202	436	199	237
Sofia	1 927	632	1 295	1 249	424	825	678	208	470
Anton	17	4	13	-	-	-	17	4	13
Bozhurishte	79	32	47	63	23	40	16	9	7
Botevgrad	254	68	186	153	46	107	101	22	79
Godech	29	..	..	..	..	..	3	..	..
Gorna Malina	47	14	33	-	-	-	47	14	33
Dolna Banya	44	12	32	44	12	32	-	-	-
Dragoman	42	11	31	25	8	17	17	3	14
Elin Pelin	201	90	111	58	27	31	143	63	80
Etropole	89	29	60	70	26	44	19	3	16
Zlatitsa	32	10	22	27	10	17	5	-	5
Ihtiman	235	58	177	201	47	154	34	11	23
Koprivshtitsa	5	-	5	5	-	5	-	-	-
Kostenets	68	28	40	35	15	20	33	13	20
Kostinbrod	129	63	66	92	49	43	37	14	23
Mirkovo	10	3	7	-	-	-	10	3	7
Pirdop	48	11	37	..	..	..	..	..	..
Pravets	85	16	69	31	10	21	54	6	48
Samokov	321	103	218	271	88	183	50	15	35
Svoge	105	37	68	47	21	26	58	16	42
Slivnitsa	64	26	38	55	20	35	9	6	3
Chavdar	9	4	5	-	-	-	9	4	5
Chelopech	14	..	..	-	-	-	14	..	..
Stara Zagora	2 546	772	1 774	1 749	624	1 125	797	148	649
Bratya Daskalovi	82	17	65	-	-	-	82	17	65
Gurkovo	56	13	43	34	9	25	22	4	18
Galabovo	76	17	59	54	14	40	22	3	19
Kazanlak	476	147	329	349	117	232	127	30	97
Maglizh	109	15	94	36	6	30	73	9	64
Nikolaevo	75	9	66	44	..	..	31	..	..
Opan	18	4	14	-	-	-	18	4	14
Pavel Banya	136	21	115	18	..	..	118	..	..
Radnevo	128	36	92	87	31	56	41	5	36
Stara Zagora	1 186	457	729	993	404	589	193	53	140
Chirpan	204	36	168	134	31	103	70	5	65
Targovishte	754	293	461	405	189	216	349	104	245
Antonovo	33	..	..	11	..	..	22	..	..
Omurtag	131	55	76	57	24	33	74	31	43
Opaka	29	..	..	11	..	..	18	..	..
Popovo	159	39	120	85	27	58	74	12	62
Targovishte	402	174	228	241	129	112	161	45	116
Haskovo	1 529	456	1 073	1 075	327	748	454	129	325
Dimitrovgrad	310	89	221	220	64	156	90	25	65
Ivaylovgrad	23	9	14	6	3	3	17	6	11
Lyubimets	80	6	74	60	..	..	20	..	..
Madzharovo	17	..	..	..	..	..	16	..	..
Mineralni Bani	36	19	17	-	-	-	36	19	17
Svilengrad	164	40	124	131	35	96	33	5	28
Simeonovgrad	112	..	..	100	8	92	12	..	..
Stambolovo	36	13	23	-	-	-	36	13	23
Topolovgrad	39	10	29	20	6	14	19	4	15
Harmanli	168	52	116	140	49	91	28	3	25
Haskovo	544	207	337	397	157	240	147	50	97
Shumen	1 077	442	635	641	266	375	436	176	260
Veliki Preslav	55	18	37	35	11	24	20	7	13
Venets	43	26	17	-	-	-	43	26	17
Varbitsa	49	16	33	21	6	15	28	10	18
Kaolinovo	110	52	58	5	..	..	105	50	55
Kaspichan	65	19	46	25	10	15	40	9	31
Nikola Kozlevo	55	22	33	-	-	-	55	22	33
Novi Pazar	110	32	78	85	27	58	25	5	20
Smyadovo	39	13	26	28	10	18	11	3	8
Hitrino	30	23	7	-	-	-	30	23	7
Shumen	521	221	300	442	200	242	79	21	58
Yambol	1 060	318	742	728	237	491	332	81	251
Bolyarovo	29	8	21	10	..	..	19	..	..
Elhovo	97	38	59	57	..	..	40	..	..
Straldzha	132	22	110	85	13	72	47	9	38
Tundzha	226	61	165	-	-	-	226	61	165
Yambol	576	189	387	576	189	387	-	-	-
.. Data is confidential according to article 25 of the Law on Statistics

29.04.2025

Time series

Pop_1.2.2._birth_DR_EN.xlsx

Metadata

Methodology

Euro-SDMX Metadata Structure (ESMS)

FERTILITY - Births, Live births, Birth rates, Mean age of the mother at birth and Total fertility rate
Contact
Contact organisation	National Statistical Institute
Contact organisation unit	Population and Housing Fund Statistics Department
Contact name	Nadejda Karlezhova
Contact person function	State expert
Contact mail address	2, P. Volov Str.; 1038 Sofia, Bulgaria
Contact email address	[email protected]
Contact phone number	+359 2 9857 543
Contact fax number
Metadata update
Metadata last certified	29 April 2025
Metadata last posted	29 April 2025
Metadata last update	29 April 2025
Statistical presentation
Data description	The births and the children born are surveyed. Registration is done at the moment of occurrence and the number is calculated as of 31.12 of the reference year. Live births and stillbirths are covered. Source of data on births and children born is the Unified System for Civil registration and Administrative Service of Population. Births are registered through a common USCRASP-CDS document "Birth notification". Regional breakdown of the fertility data is done according to the country administrative-territorial division as of 31.12 of the reference year (settlements, municipalities, districts and statistical regions) based on the current address. Live births are used for calculation of indicators, characterizing the fertility.
Classification system	· Classification of Territorial Units for Statistical Purposes in Bulgaria (NUTS); · Unified Classification of the Administrative-Territorial and Territorial Units in Bulgaria (UCATTU).
Sector coverage	All children born with a usual residence (current address) in the Republic of Bulgaria are included.
Statistical concepts and definitions	‘Birth’ is a complete expulsion or extraction from the mother of a foetus, irrespective alive or dead, that meet the following criteria: a) 25 weeks of gestation and/or 700 grams and over; b) less than 25 weeks of gestation - provided that the foetus has lived at least 72 hours (3 days). "Alive" is a foetus who shows signs of blood circulation. In absence of such signs, the foetus is considered “dead” (foetus mortuus). “Abortion” is a loss or interruption of a pregnancy before the foetus to meet the above mentioned criteria. Crude birth rate is the ratio of the number of live births during the year to the average annual population in that year. The value is expressed per 1000 inhabitants. The total fertility rate is the sum of the age-specific fertility rates for the reference year. It represents the mean number of children that would be born alive to a woman during her lifetime if she were to pass through her childbearing years conforming to the fertility rates by age of a given year. The net reproduction rate is the ratio between the number of women who have gave a birth during the year and the daughters born during the same year taking into account the mortality. It represents the average number of daughters that will survive until childbearing ages, born to a woman if they will experience the age-specific fertility and mortality rates of the year in question, i.e. how many girls replace a mother under the reproduction conditions during the respective year. The age of parents at birth is calculated in completed years based on the date of birth of parents and the date of event birth. The mean age of the mother at childbearing is calculated as a weighted average within the interval between the birth of mothers generations and children birth.
Statistical unit	Children born - live born and stillborn.
Statistical population	Total number of births.
Reference area	Regional breakdown of the fertility data is done according to the country administrative-territorial division as of 31.12 of the reference year (settlements, municipalities, districts and statistical regions).
Time coverage	1888 - 2025 total number and by sex; 2010 - 2025 on the NSI website.
Base period	Not applicable.
Unit of measure
Number; per 1 000 population; per 100 population, years.
Reference period
Calendar year
Institutional mandate
Legal acts and other agreements	· Law on Statistics; · Law on Civil Registration; · Ordinance of the Ministry of Health. · Regulation (EU) 1260/2013 of the European Parliament and of the Council on the European demographic statistics; · Commission implementing regulation (EU) № 205/2014 laying down uniformed conditions for the implementation of Regulation (EU) No 1260/2013 of the European Parliament and the Council on European demographic statistics, as regards breakdowns of data, deadlines and data revisions;
Data sharing	Data are transmitted to Eurostat, UNICEF, UN ECE, World bank and other institutions on the basis of Regulation (EU) 1260/2013 of the European Parliament and of the Council on the European demographic statistics.
Confidentiality
Confidentiality - policy	· Law on Statistics; · Regulation (EC) No 223/2009 on European statistics (recital 24 and Article 20(4)) of 11 March 2009 (OJ L 87, p. 164), stipulates the need to establish common principles and guidelines ensuring the confidentiality of data used for the production of European statistics and the access to those confidential data with due account for technical developments and the requirements of users in a democratic society.
Confidentiality - data treatment	Individual data are not published in accordance with article 25 of the Law on Statistics. The publishing of individual data can be performed only in accordance with article 26 of the same law.
Release policy
Release calendar	Information is published annually according to the Release Calendar presenting the results of the statistical surveys carried out by the National Statistical Institute.
Release calendar access	The calendar is available on the NSI website: http://www.nsi.bg/en/node/480
User access	Data is published on the NSI website, section Population - Demography, migration and projections in accordance with the Law on Statistics and the European Statistics Code of Practice respecting the professional independence and aimed at objectivity, transparency and equal treatment of all consumers.
Frequency of dissemination
Annually
Accessibility and clarity
News release	News release "Population and demographic processes".
Publications	· Population and demographic processes; · Statistical Reference book; · Statistical Yearbook; · Booklet "Bulgaria".
On-line database	Data on Fertility are available to all users of the NSI website under the heading Population - Demography, Migration and Projections - Fertility: http://www.nsi.bg/en/node/6610 Information System Infostat: https://infostat.nsi.bg/infostat/pages/module.jsf?x_2=52
Micro-data access	Anonymised individual data can be provide for scientific and research purposes, and for individual request according to the Rules for the provision of anonymised individual data for scientific and research purposes.
Other	Information service on request, according to the Rules for the dissemination of statistical products and services in NSI.
Documentation on methodology	· Methodology on fertility: http://www.nsi.bg/sites/default/files/files/metadata/Pop_1_Metodology_births_en.pdf; · Manual for functioning of the Unified System for Civil registration and Administrative Service of Population.
Quality documentation	Not available.
Quality management
Quality assurance	Not applicable.
Quality assessment	Not applicable.
Relevance
User needs	Data on fertility are presented annually to the Eurostat, UN, UNICEF, ECE, WHO and others ? questionnaires filled in annually. At national and regional level the main data users are ministries, agencies, national organisations and local authorities. Data is presented to scientific institutes, universities, NGOs and others based on requests.
User satisfaction	No user' satisfaction surveys are carried out.
Completeness	Data on fertility is available by sex, weight, height, consecutive number and residence of the child (different territorial levels), place and assistance at birth, multi-foetal births, age (different groupings) of the parents, year of birth of the parents, consecutive number of the mother marriage, pregnancy, citizenship and country of birth of the mother, citizenship of the father.
Accuracy and reliability
Overall accuracy	Not applicable.
Sampling error	Not applicable.
Non-sampling error	Not applicable.
Timeliness and punctuality
Timeliness	Data is published up to the end of April of the year following the reference year.
Punctuality	Data is released according to the terms provided in the Release Calendar presenting the results of the statistical surveys carried out by the National Statistical Institute..
Coherence and comparability

Comparability - geographical	Data is collected and processed for the different territorial units using one and the same methodology and definitions.
Comparability - over time	Changes of the methodology and definitions for different time periods are published in the survey methodology and metadata. Due to the availability of a new population estimation based on Census 2021 data, there is a break in the time series for all 2022 rates, calculated with the average annual population.
Coherence - cross domain	Not applicable.
Coherence - internal	Not applicable.
Cost and burden
Not applicable.
Data revision
Data revision - policy	Not applicable.
Data revision - practice	Not applicable.
Statistical processing
Source data	Source of data on births and children born is the Unified System for Civil registration and Administrative Service of Population. Births are registered through a common USCRASP-CDS ?Birth notification?.
Frequency of data collection	Monthly
Data collection	Exhaustively for all births registered during the year. Computer files are received from the Unified System for Civil registration and Administrative Service of Population (administrative source).
Data validation	Data on demographic events is checked and controlled before to be loaded in the IS "Demography". For successful processing, the initial notification should meet the system rules on validation and control. The processed results are validated in respect the consistency of a single table and between the tables.
Data compilation	Data is processed by the IS "Demography" according to the rules for validation and control of the demographic events.
Adjustment	Not applicable.
Comment

Download in SDMX 2.1 file format: FERTILITY - Births, Live births, Birth rates, Mean age of the mother at birth and Total fertility rate

Metadata Structure Definition in SDMX 2.1: ESMS_MSD+BNSI+2.0+SDMX.2.1.xml

Download in SDMX 2.0 file format: FERTILITY - Births, Live births, Birth rates, Mean age of the mother at birth and Total fertility rate

Metadata Structure Definition in SDMX 2.0: ESMS_MSD+BNSI+2.0+SDMX.2.0.xml

Quality reports

ESS Standard for Quality Reports Structure (ESQRS)

FERTILITY - Births, Live births, Birth rates, Mean age of the mother at birth and Total fertility rate
Contact
Contact organisation	National Statistical Institute
Contact organisation unit	Population and Housing Fund Statistics Department
Contact name	Nadejda Karlezhova
Contact person function	State expert
Contact mail address	2, P. Volov Str.; 1038 Sofia, Bulgaria
Contact email address	[email protected]
Contact phone number	+359 2 9857 543
Contact fax number
Statistical presentation
Data description	The births and the children born are surveyed. Registration is done at the moment of occurrence and the number is calculated as of 31.12 of the reference year. Live births and stillbirths are covered. Source of data on births and children born is the Unified System for Civil registration and Administrative Service of Population. Births are registered through a common USCRASP-CDS document "Birth notification". Regional breakdown of the fertility data is done according to the country administrative-territorial division as of 31.12 of the reference year (settlements, municipalities, districts and statistical regions) based on the current address. Live births are used for calculation of indicators, characterizing the fertility.
Classification system	· Classification of Territorial Units for Statistical Purposes in Bulgaria (NUTS); · Unified Classification of the Administrative-Territorial and Territorial Units in Bulgaria (UCATTU).
Sector coverage	All children born with a usual residence (current address) in the Republic of Bulgaria are included.
Statistical concepts and definitions	‘Birth’ is a complete expulsion or extraction from the mother of a foetus, irrespective alive or dead, that meet the following criteria: a) 25 weeks of gestation and/or 700 grams and over; b) less than 25 weeks of gestation - provided that the foetus has lived at least 72 hours (3 days). "Alive" is a foetus who shows signs of blood circulation. In absence of such signs, the foetus is considered “dead” (foetus mortuus). “Abortion” is a loss or interruption of a pregnancy before the foetus to meet the above mentioned criteria. Crude birth rate is the ratio of the number of live births during the year to the average annual population in that year. The value is expressed per 1000 inhabitants. The total fertility rate is the sum of the age-specific fertility rates for the reference year. It represents the mean number of children that would be born alive to a woman during her lifetime if she were to pass through her childbearing years conforming to the fertility rates by age of a given year. The net reproduction rate is the ratio between the number of women who have gave a birth during the year and the daughters born during the same year taking into account the mortality. It represents the average number of daughters that will survive until childbearing ages, born to a woman if they will experience the age-specific fertility and mortality rates of the year in question, i.e. how many girls replace a mother under the reproduction conditions during the respective year. The age of parents at birth is calculated in completed years based on the date of birth of parents and the date of event birth. The mean age of the mother at childbearing is calculated as a weighted average within the interval between the birth of mothers generations and children birth.
Statistical unit	Children born - live born and stillborn.
Statistical population	Total number of births.
Reference area	Regional breakdown of the fertility data is done according to the country administrative-territorial division as of 31.12 of the reference year (settlements, municipalities, districts and statistical regions).
Time coverage	1888 - 2025 total number and by sex; 2010 - 2025 on the NSI website.
Base period	Not applicable.
Statistical processing
Source data	Source of data on births and children born is the Unified System for Civil registration and Administrative Service of Population. Births are registered through a common USCRASP-CDS ?Birth notification?.
Frequency of data collection	Monthly
Data collection	Exhaustively for all births registered during the year. Computer files are received from the Unified System for Civil registration and Administrative Service of Population (administrative source).
Data validation	Data on demographic events is checked and controlled before to be loaded in the IS "Demography". For successful processing, the initial notification should meet the system rules on validation and control. The processed results are validated in respect the consistency of a single table and between the tables.
Data compilation	Data is processed by the IS "Demography" according to the rules for validation and control of the demographic events.
Adjustment	Not applicable.
Quality management
Quality assurance	Not applicable.
Quality assessment	Not applicable.
Relevance
User needs	Data on fertility are presented annually to the Eurostat, UN, UNICEF, ECE, WHO and others ? questionnaires filled in annually. At national and regional level the main data users are ministries, agencies, national organisations and local authorities. Data is presented to scientific institutes, universities, NGOs and others based on requests.
User satisfaction	No user' satisfaction surveys are carried out.
Completeness	Data on fertility is available by sex, weight, height, consecutive number and residence of the child (different territorial levels), place and assistance at birth, multi-foetal births, age (different groupings) of the parents, year of birth of the parents, consecutive number of the mother marriage, pregnancy, citizenship and country of birth of the mother, citizenship of the father.
Data completeness - rate	100%
Accuracy and reliability
Overall accuracy	Not applicable.
Sampling error	Not applicable.
Sampling errors - indicators	Not applicable.
Non-sampling error	Not applicable.
Coverage error	Not applicable.
Over-coverage - rate	Not applicable
Common units - proportion	Not applicable
Measurement error	Not applicable
Non response error	Not applicable
Unit non-response - rate	Not applicable
Item non-response - rate	Not applicable
Processing error	Not applicable
Imputation - rate	Not applicable
Model assumption error	Not applicable
Seasonal adjustment	Not applicable
Data revision - policy	Not applicable.
Data revision - practice	Not applicable.
Data revision - average size
Timeliness and punctuality
Timeliness	Data is published up to the end of April of the year following the reference year.
Time lag - first results	4 months after the reference year.
Time lag - final results	4 months after the reference year.
Punctuality	Data is released according to the terms provided in the Release Calendar presenting the results of the statistical surveys carried out by the National Statistical Institute..
Punctuality - delivery and publication	Nor applicable
Coherence and comparability

Comparability - geographical	Data is collected and processed for the different territorial units using one and the same methodology and definitions.
Asymmetry for mirror flows statistics - coefficient	Not applicable
Comparability - over time	Changes of the methodology and definitions for different time periods are published in the survey methodology and metadata. Due to the availability of a new population estimation based on Census 2021 data, there is a break in the time series for all 2022 rates, calculated with the average annual population.
Length of comparable time series	2000 onwards
Coherence - cross domain	Not applicable.
Coherence - sub annual and annual statistics	Not applicable
Coherence - National Accounts	Not applicable
Coherence - internal	Not applicable.
Accessibility and clarity
News release	News release "Population and demographic processes".
Publications	· Population and demographic processes; · Statistical Reference book; · Statistical Yearbook; · Booklet "Bulgaria".
On-line database	Data on Fertility are available to all users of the NSI website under the heading Population - Demography, Migration and Projections - Fertility: http://www.nsi.bg/en/node/6610 Information System Infostat: https://infostat.nsi.bg/infostat/pages/module.jsf?x_2=52
Data tables - consultations	not applicable
Micro-data access	Anonymised individual data can be provide for scientific and research purposes, and for individual request according to the Rules for the provision of anonymised individual data for scientific and research purposes.
Other	Information service on request, according to the Rules for the dissemination of statistical products and services in NSI.
Metadata - consultations	not applicable
Documentation on methodology	· Methodology on fertility: http://www.nsi.bg/sites/default/files/files/metadata/Pop_1_Metodology_births_en.pdf; · Manual for functioning of the Unified System for Civil registration and Administrative Service of Population.
Metadata completeness – rate	100%
Quality documentation	Not available.
Cost and burden
Not applicable.
Confidentiality
Confidentiality - policy	· Law on Statistics; · Regulation (EC) No 223/2009 on European statistics (recital 24 and Article 20(4)) of 11 March 2009 (OJ L 87, p. 164), stipulates the need to establish common principles and guidelines ensuring the confidentiality of data used for the production of European statistics and the access to those confidential data with due account for technical developments and the requirements of users in a democratic society.
Confidentiality – data treatment	Individual data are not published in accordance with article 25 of the Law on Statistics. The publishing of individual data can be performed only in accordance with article 26 of the same law.
Comment

Download in SDMX 2.1 file format: FERTILITY - Births, Live births, Birth rates, Mean age of the mother at birth and Total fertility rate

Metadata Structure Definition in SDMX 2.1: ESQRS_MSD+BNSI+2.0+SDMX.2.1.xml

Download in SDMX 2.0 file format: FERTILITY - Births, Live births, Birth rates, Mean age of the mother at birth and Total fertility rate

Metadata Structure Definition in SDMX 2.0: ESQRS_MSD+BNSI+2.0+SDMX.2.0.xml

Press releases

Date	Name	File
22.05.2025	Mortality and Life expectancy - 2022 - 2024	738.1 kb
29.04.2025	Population and Demographic processes - 2024 - final data	646.4 kb
26.07.2024	Post census revision of the population data for the period 2012 – 2021	220.84 kb
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Date	Name
29.04.2026	Population and Demographic processes - 2025 - final data
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Publications

Date	Name	File
1.10.2025	Population and Demographic Processes 2024	4090.24 kb
28.08.2025	Brochure ‘Bulgaria 2025’	8205.55 kb
18.08.2025	Statistical Reference Book 2025	16064.1 kb
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