Live births by districts, municipalities and mother’s age

Table

LIVE BIRTHS BY DISTRICTS, MUNICIPALITIES AND MOTHER'S AGE IN 2025

(Number)
Districts Municipalities	Total	Mother's age
Districts Municipalities	Total	Under 20	20 - 24	25 - 29	30 - 34	35 - 39	40 - 44	45 +	Unknown
Total	50 241	5 482	9 193	12 712	12 439	7 945	1 994	475	1
Blagoevgrad	2 220	196	447	623	551	319	75	9	-
Bansko	72	2	11	20	20	16	3	-	-
Belitsa	80	5	28	26	11	8	2	-	-
Blagoevgrad	547	29	79	136	168	104	27	4	-
Gotse Delchev	228	2	49	73	59	35	9	1	-
Garmen	153	19	45	47	24	16	2	-	-
Kresna	24	-	1	7	10	6	-	-	-
Petrich	390	66	82	97	90	44	11	-	-
Razlog	161	18	40	38	35	22	7	1	-
Sandanski	202	19	32	66	45	28	10	2	-
Satovcha	93	3	17	37	21	13	1	1	-
Simitli	88	8	22	30	20	7	1	-	-
Strumyani	45	14	13	9	6	3	-	-	-
Hadzhidimovo	52	2	7	15	19	9	-	-	-
Yakoruda	85	9	21	22	23	8	2	-	-
Burgas	2 827	355	526	719	659	443	93	32	-
Aytos	186	36	38	48	43	19	2	-	-
Burgas	1 408	117	194	351	372	287	66	21	-
Kameno	62	13	15	16	10	7	-	1	-
Karnobat	171	47	45	35	27	15	1	1	-
Malko Tarnovo	18	2	6	3	1	6	-	-	-
Nesebar	181	9	33	41	52	34	7	5	-
Pomorie	184	24	36	53	32	30	6	3	-
Primorsko	46	3	11	14	10	6	2	-	-
Ruen	204	20	47	73	57	6	1	-	-
Sozopol	92	19	16	25	18	10	3	1	-
Sredets	119	33	41	21	14	7	3	-	-
Sungurlare	102	25	27	28	14	6	2	-	-
Tsarevo	54	7	17	11	9	10	-	-	-
Varna	3 461	218	532	970	936	613	147	45	-
Avren	70	10	24	12	10	7	7	-	-
Aksakovo	151	13	43	44	33	15	2	1	-
Beloslav	53	4	11	14	16	6	1	1	-
Byala	18	3	2	5	5	2	1	-	-
Varna	2 551	88	253	745	777	520	128	40	-
Vetrino	38	2	6	10	13	6	-	1	-
Valchi Dol	67	11	22	15	10	8	1	-	-
Devnya	63	10	20	17	13	3	-	-	-
Dolni Chiflik	150	30	61	30	15	11	2	1	-
Dalgopol	91	15	34	19	12	11	-	-	-
Provadia	151	21	46	42	22	16	3	1	-
Suvorovo	58	11	10	17	10	8	2	-	-
Veliko Tarnovo	1 303	100	295	340	349	159	49	11	-
Veliko Tarnovo	547	12	85	162	172	84	28	4	-
Gorna Oryahovitsa	203	22	50	44	55	24	5	3	-
Elena	48	8	14	12	10	4	-	-	-
Zlataritsa	27	3	7	7	7	3	-	-	-
Lyaskovets	44	1	4	18	12	8	1	-	-
Pavlikeni	103	15	37	28	15	6	2	-	-
Polski Trambesh	81	14	27	20	14	1	3	2	-
Svishtov	149	7	33	28	49	23	7	2	-
Strazhitsa	91	18	34	18	13	6	2	-	-
Suhindol	10	-	4	3	2	-	1	-	-
Vidin	439	87	125	86	82	47	7	5	-
Belogradchik	32	12	10	1	3	6	-	-	-
Boynitsa	5	-	2	1	1	1	-	-	-
Bregovo	13	4	4	2	2	1	-	-	-
Vidin	240	31	55	61	54	30	5	4	-
Gramada	11	3	4	3	-	-	-	1	-
Dimovo	56	18	21	1	12	3	1	-	-
Kula	22	3	7	6	3	2	1	-	-
Makresh	5	2	1	1	-	1	-	-	-
Novo Selo	13	2	4	2	3	2	-	-	-
Ruzhintsi	28	11	7	6	3	1	-	-	-
Chuprene	14	1	10	2	1	-	-	-	-
Vratsa	1 139	140	299	310	221	134	29	6	-
Borovan	48	13	14	9	3	7	2	-	-
Byala Slatina	167	26	68	31	26	13	3	-	-
Vratsa	407	30	73	130	93	64	12	5	-
Kozloduy	142	15	39	41	27	15	4	1	-
Krivodol	82	18	26	19	12	4	3	-	-
Mezdra	138	15	30	48	28	16	1	-	-
Mizia	52	8	11	10	17	5	1	-	-
Oryahovo	54	8	20	14	6	3	3	-	-
Roman	33	5	10	5	8	5	-	-	-
Hayredin	16	2	8	3	1	2	-	-	-
Gabrovo	558	38	112	149	161	74	18	6	-
Gabrovo	276	17	44	70	89	45	10	1	-
Dryanovo	33	2	8	10	7	6	-	-	-
Sevlievo	204	18	51	54	55	16	6	4	-
Tryavna	45	1	9	15	10	7	2	1	-
Dobrich	913	97	214	243	190	126	39	4	-
Balchik	118	12	29	30	24	21	2	-	-
General Toshevo	77	10	19	21	13	13	-	1	-
Dobrich-selska	123	20	44	28	18	10	3	-	-
Dobrich	386	23	59	104	106	64	28	2	-
Kavarna	80	10	20	24	13	10	3	-	-
Krushari	34	7	18	6	2	1	-	-	-
Tervel	76	14	17	23	13	6	2	1	-
Shabla	19	1	8	7	1	1	1	-	-
Kardzhali	754	51	146	224	202	97	28	6	-
Ardino	25	-	5	6	4	8	2	-	-
Dzhebel	27	-	6	6	7	7	1	-	-
Kirkovo	78	3	20	23	23	7	2	-	-
Krumovgrad	104	16	32	31	15	8	2	-	-
Kardzhali	419	28	67	124	121	59	14	6	-
Momchilgrad	67	3	9	23	23	4	5	-	-
Chernoochene	34	1	7	11	9	4	2	-	-
Kyustendil	677	101	121	170	161	90	28	6	-
Bobovdol	39	4	10	5	11	5	3	1	-
Boboshevo	13	-	1	3	7	1	1	-	-
Dupnitsa	253	39	49	64	59	32	10	-	-
Kocherinovo	22	2	5	7	4	3	1	-	-
Kyustendil	299	52	53	74	63	42	10	5	-
Nevestino	2	-	-	2	-	-	-	-	-
Rila	17	3	1	4	3	5	1	-	-
Sapareva Banya	31	-	2	11	14	2	2	-	-
Treklyano	1	1	-	-	-	-	-	-	-
Lovech	871	172	214	212	168	84	19	2	-
Apriltsi	15	-	2	5	5	1	1	1	-
Letnitsa	29	9	6	10	3	-	1	-	-
Lovech	184	22	26	52	50	27	7	-	-
Lukovit	208	63	71	30	29	13	2	-	-
Teteven	124	16	30	33	27	17	1	-	-
Troyan	163	11	34	55	42	16	5	-	-
Ugarchin	61	20	17	14	5	5	-	-	-
Yablanitsa	87	31	28	13	7	5	2	1	-
Montana	829	137	234	217	128	88	20	5	-
Berkovitsa	109	23	28	25	19	11	2	1	-
Boychinovtsi	80	20	26	17	11	5	1	-	-
Brusartsi	30	6	9	9	3	3	-	-	-
Valchedram	75	12	28	20	6	7	2	-	-
Varshets	69	16	20	15	10	5	3	-	-
Georgi Damyanovo	2	1	-	-	-	-	1	-	-
Lom	113	15	23	33	17	18	7	-	-
Medkovets	26	7	8	5	4	2	-	-	-
Montana	271	29	67	78	54	35	4	4	-
Chiprovtsi	9	-	2	6	-	1	-	-	-
Yakimovo	45	8	23	9	4	1	-	-	-
Pazardzhik	1 758	363	399	405	329	195	59	8	-
Batak	29	3	6	9	7	4	-	-	-
Belovo	27	4	4	7	7	4	1	-	-
Bratsigovo	56	17	10	14	10	3	2	-	-
Velingrad	319	72	80	70	61	27	8	1	-
Lesichovo	43	11	16	10	2	3	1	-	-
Pazardzhik	641	131	122	145	113	92	33	5	-
Panagyurishte	137	15	29	36	30	21	5	1	-
Peshtera	106	24	21	25	26	9	1	-	-
Rakitovo	142	32	47	30	20	11	2	-	-
Septemvri	180	47	46	40	28	13	6	-	-
Strelcha	35	5	3	7	15	4	-	1	-
Sarnitsa	43	2	15	12	10	4	-	-	-
Pernik	724	59	132	185	193	119	30	6	-
Breznik	26	4	8	5	7	2	-	-	-
Zemen	15	2	6	4	3	-	-	-	-
Kovachevtsi	7	1	1	1	2	2	-	-	-
Pernik	544	30	83	152	149	100	24	6	-
Radomir	112	16	27	21	28	14	6	-	-
Tran	20	6	7	2	4	1	-	-	-
Pleven	1 620	241	406	388	332	202	43	8	-
Belene	24	3	5	7	6	3	-	-	-
Gulyantsi	64	8	16	17	12	9	2	-	-
Dolna Mitropolia	154	32	48	36	24	11	2	1	-
Dolni Dabnik	99	24	31	19	15	10	-	-	-
Iskar	43	12	15	7	4	5	-	-	-
Knezha	96	22	26	17	16	13	2	-	-
Levski	101	11	31	27	17	13	2	-	-
Nikopol	26	4	8	9	2	3	-	-	-
Pleven	803	92	163	200	200	111	32	5	-
Pordim	40	4	12	11	7	5	-	1	-
Cherven Bryag	170	29	51	38	29	19	3	1	-
Plovdiv	5 392	569	954	1 367	1 384	848	228	42	-
Asenovgrad	422	45	98	117	99	52	8	3	-
Brezovo	59	15	17	10	12	3	2	-	-
Kaloyanovo	75	9	18	25	11	11	1	-	-
Karlovo	368	81	94	72	74	37	10	-	-
Krichim	66	10	27	16	7	5	1	-	-
Kuklen	40	3	7	15	8	5	2	-	-
Laki	11	-	-	4	4	2	1	-	-
Maritsa	266	40	60	58	70	32	5	1	-
Perushtitsa	45	11	15	9	8	2	-	-	-
Plovdiv	2 864	180	330	769	842	556	156	31	-
Parvomay	142	18	37	31	38	11	5	2	-
Rakovski	268	52	68	53	58	29	8	-	-
Rodopi	234	14	43	71	52	40	11	3	-
Sadovo	171	39	56	35	26	9	6	-	-
Sopot	65	3	7	18	23	12	2	-	-
Stamboliyski	168	34	43	33	28	25	3	2	-
Saedinenie	80	5	23	21	14	12	5	-	-
Hisarya	48	10	11	10	10	5	2	-	-
Razgrad	626	48	152	188	151	72	14	1	-
Zavet	60	6	15	20	14	4	1	-	-
Isperih	121	10	23	39	29	18	2	-	-
Kubrat	83	7	29	17	18	11	1	-	-
Loznitsa	52	5	13	20	8	5	1	-	-
Razgrad	244	13	59	70	66	26	9	1	-
Samuil	41	6	10	11	10	4	-	-	-
Tsar Kaloyan	25	1	3	11	6	4	-	-	-
Ruse	1 097	75	221	316	273	158	43	11	-
Borovo	20	1	6	4	4	3	2	-	-
Byala	74	12	18	17	17	6	2	2	-
Vetovo	67	13	19	18	12	4	1	-	-
Dve Mogili	42	3	12	18	7	1	1	-	-
Ivanovo	34	-	4	18	7	5	-	-	-
Ruse	788	40	135	226	210	134	34	9	-
Slivo Pole	49	3	15	9	15	5	2	-	-
Tsenovo	23	3	12	6	1	-	1	-	-
Silistra	632	82	154	162	140	75	16	3	-
Alfatar	10	1	2	4	3	-	-	-	-
Glavinitsa	72	10	16	23	14	7	2	-	-
Dulovo	180	27	58	46	30	18	1	-	-
Kaynardzha	48	21	12	7	4	3	1	-	-
Silistra	218	17	39	52	59	38	10	3	-
Sitovo	34	2	9	11	9	2	1	-	-
Tutrakan	70	4	18	19	21	7	1	-	-
Sliven	2 009	640	523	391	253	149	44	9	-
Kotel	195	51	60	38	29	15	1	1	-
Nova Zagora	304	106	63	66	42	16	9	2	-
Sliven	1 276	399	321	251	159	107	33	6	-
Tvarditsa	234	84	79	36	23	11	1	-	-
Smolyan	410	26	84	129	87	72	11	-	1
Banite	5	-	2	2	-	1	-	-	-
Borino	12	-	1	6	2	3	-	-	-
Devin	41	5	9	10	7	6	4	-	-
Dospat	30	2	6	14	6	2	-	-	-
Zlatograd	37	2	8	12	3	10	2	-	-
Madan	44	1	4	19	12	6	1	-	1
Nedelino	8	-	1	4	1	1	1	-	-
Rudozem	30	-	10	4	9	6	1	-	-
Smolyan	176	16	38	50	40	30	2	-	-
Chepelare	27	-	5	8	7	7	-	-	-
Sofia (stolitsa)	11 562	289	1 002	2 835	3 786	2 745	723	182	-
Stolichna	11 562	289	1 002	2 835	3 786	2 745	723	182	-
Sofia	1 843	260	410	480	391	225	57	20	-
Anton	13	-	2	3	6	1	1	-	-
Bozhurishte	70	3	8	15	18	21	5	-	-
Botevgrad	293	34	70	90	56	28	11	4	-
Godech	35	1	9	10	6	8	1	-	-
Gorna Malina	55	6	16	12	11	8	1	1	-
Dolna Banya	59	15	13	15	9	5	1	1	-
Dragoman	26	1	7	5	7	6	-	-	-
Elin Pelin	174	9	26	45	49	37	7	1	-
Etropole	75	16	12	21	17	6	1	2	-
Zlatitsa	31	3	10	3	8	3	2	2	-
Ihtiman	204	64	63	43	16	14	2	2	-
Koprivshtitsa	15	-	3	8	2	1	1	-	-
Kostenets	59	5	15	12	20	5	2	-	-
Kostinbrod	140	4	20	51	40	18	6	1	-
Mirkovo	16	1	5	5	1	3	1	-	-
Pirdop	41	2	10	9	13	5	2	-	-
Pravets	87	22	23	18	8	15	1	-	-
Samokov	268	67	72	58	42	21	7	1	-
Svoge	105	3	15	38	33	11	4	1	-
Slivnitsa	49	-	7	14	18	5	1	4	-
Chavdar	8	2	1	1	3	1	-	-	-
Chelopech	20	2	3	4	8	3	-	-	-
Stara Zagora	2 389	425	496	574	467	341	67	19	-
Bratya Daskalovi	69	20	15	14	12	6	-	2	-
Gurkovo	60	19	18	12	6	5	-	-	-
Galabovo	78	17	26	18	9	6	2	-	-
Kazanlak	495	70	99	111	126	73	12	4	-
Maglizh	120	46	34	22	8	9	1	-	-
Nikolaevo	82	39	19	14	3	6	1	-	-
Opan	14	3	6	1	1	3	-	-	-
Pavel Banya	117	39	31	21	13	12	1	-	-
Radnevo	133	23	40	29	19	17	3	2	-
Stara Zagora	1 041	99	154	293	246	196	43	10	-
Chirpan	180	50	54	39	24	8	4	1	-
Targovishte	619	61	154	170	149	63	14	8	-
Antonovo	30	8	8	6	3	5	-	-	-
Omurtag	100	15	33	26	14	9	2	1	-
Opaka	32	1	6	15	7	2	1	-	-
Popovo	124	10	27	34	41	8	2	2	-
Targovishte	333	27	80	89	84	39	9	5	-
Haskovo	1 576	278	372	369	319	187	44	7	-
Dimitrovgrad	302	46	71	59	69	43	11	3	-
Ivaylovgrad	33	2	8	8	11	3	1	-	-
Lyubimets	93	30	23	19	13	7	1	-	-
Madzharovo	10	4	2	-	2	1	-	1	-
Mineralni Bani	33	2	8	10	9	4	-	-	-
Svilengrad	156	28	34	34	29	27	3	1	-
Simeonovgrad	117	46	35	21	6	7	1	1	-
Stambolovo	34	4	9	13	5	2	1	-	-
Topolovgrad	54	12	21	14	4	2	1	-	-
Harmanli	174	39	40	46	27	16	6	-	-
Haskovo	570	65	121	145	144	75	19	1	-
Shumen	1 008	100	233	279	233	122	31	10	-
Veliki Preslav	38	3	12	10	8	4	1	-	-
Venets	37	7	11	12	5	2	-	-	-
Varbitsa	58	11	25	11	7	4	-	-	-
Kaolinovo	78	8	27	22	15	4	2	-	-
Kaspichan	56	8	16	16	9	6	1	-	-
Nikola Kozlevo	64	14	26	10	5	6	3	-	-
Novi Pazar	92	17	26	18	19	7	5	-	-
Smyadovo	32	4	6	9	8	3	1	1	-
Hitrino	33	-	13	8	9	1	1	1	-
Shumen	520	28	71	163	148	85	17	8	-
Yambol	985	274	236	211	144	98	18	4	-
Bolyarovo	26	11	5	4	3	2	1	-	-
Elhovo	90	18	28	27	10	5	2	-	-
Straldzha	151	56	36	31	16	9	3	-	-
Tundzha	196	64	60	30	25	14	3	-	-
Yambol	522	125	107	119	90	68	9	4	-

29.04.2026

Time series

Pop_1.2.3._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 2026
Metadata last posted	29 April 2026
Metadata last update	29 April 2026
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. 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) 2458/2025 of the European Parliament and of the Council on on European statistics on population and housing, amending Regulation (EC) No 862/2007 and repealing Regulations (EC) No 763/2008 and (EU) No 1260/2013; · 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.
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. 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.
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
29.05.2026	Mortality and Life expectancy - 2023 - 2025	316.65 kb
29.04.2026	Population and Demographic processes - 2025 - final data	720.3 kb
22.05.2025	Mortality and Life expectancy - 2022 - 2024	738.1 kb
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