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Description

FIRSTBIRTHYR indicates the year of birth of the respondent's first-born child.

Comparability — Index

GENERAL
Afghanistan
 Nepal
Serbia
 Thailand

Comparability

This variable uses the Gregorian calendar. Some samples restrict the universe of respondents to ever-married women.

Comparability — Afghanistan [top]

Some date variables in Afghanistan samples are originally reported in the Shamsi or Solar Hijri calendar, which is a solar calendar approximately 622 years and 9 months behind the Gregorian calendar.
IPUMS has converted months and years to Gregorian algorithmically for Afghanistan 2022, but has not converted day variables, such as FIRSTBIRTHDAY. These remain as the Shamsi calendar day for Afghanistan 2022. FIRSTBIRTHDAY was reported in Gregorian for Afghanistan 2010.

Comparability — Nepal [top]

All standard date variables in Nepal samples are given in the Nepali calendar. The Nepali calendar, or Vikram Samvat, is a lunar calendar consisting of 12 months of 29 to 32 days each. According to the Gregorian calendar, the Nepali calendar begins in mid-April. Because the 12 months do not match the sidereal year, correctional months are occasionally added or subtracted. The exact date (day, month, year) is needed to convert dates given in Vikram Samvat to the Gregorian calendar. IPUMS has converted the month and year variables to the exact month when the day was available. Otherwise, it is only possible to approximate the month. Vikram Samvat is approximately 56 years, 8 months, and 15 days ahead of the Gregorian calendar.
IPUMS has converted months and years for Nepal samples algorithmically, but has not converted day variables, such as FIRSTBIRTHDAY. These values remain as the Vikram Samvat day.

Comparability — Serbia [top]

In Serbia 2005, this question was only asked of Roma women living in Roma Settlements.

Comparability — Thailand [top]

Date variables in Thailand samples are reported in the Thai Solar calendar, which is a solar calendar 543 years ahead of the Gregorian calendar. The months and days remain the same between the Gregorian and Thai Solar calendars.
IPUMS has converted the year variables for Thailand samples to Gregorian calendar years.

Universe

  • Afghanistan 2010: Women age 15-49 who ever gave birth
  • Afghanistan 2022: Women age 15-49 who ever gave birth
  • Albania 2005: Women age 15-49 who ever gave birth
  • Algeria 2018: Women age 15-49 who ever gave birth
  • Argentina 2011: Women age 15-49 who ever gave birth
  • Argentina 2019: Women age 15-49 who ever gave birth
  • Bangladesh 2012: Ever-married women age 15-49 who ever gave birth
  • Bangladesh 2019: Women age 15-49 who ever gave birth
  • Barbados 2012: Women age 15-49 who ever gave birth
  • Belarus 2005: Women age 15-49 who ever gave birth
  • Belize 2006: Women age 15-49 who ever gave birth
  • Belize 2011: Women age 15-49 who ever gave birth
  • Benin 2014: Women age 15-49 who ever gave birth
  • Benin 2021: Women age 15-49 who ever gave birth
  • Bhutan 2010: Women age 15-49 who ever gave birth
  • Bosnia and Herzegovina (Roma) 2011: Women age 15-49 who ever gave birth
  • Bosnia and Herzegovina 2011: Women age 15-49 who ever gave birth
  • Burkina Faso 2006: Women age 15-49 who ever gave birth
  • Burundi 2005: Women age 15-49 who ever gave birth
  • Cameroon 2014: Women age 15-49 who ever gave birth
  • Central African Republic 2006: Women age 15-49 who ever gave birth
  • Central African Republic 2010: Women age 15-49 who ever gave birth
  • Central African Republic 2018: Women age 15-49 who ever gave birth
  • Chad 2010: Women age 15-49 who ever gave birth
  • Chad 2019: Women age 15-49 who ever gave birth
  • Comoros 2022: Women age 15-49 who ever gave birth
  • Congo 2014: Women age 15-49 who ever gave birth
  • Congo Democratic Republic 2010: Women age 15-49 who ever gave birth
  • Congo Democratic Republic 2017: Women age 15-49 who ever gave birth
  • Costa Rica 2018: Women age 15-49 who ever gave birth
  • Cote D'Ivoire 2016: Women age 15-49 who ever gave birth
  • Cuba 2010: Women age 15-49 who ever gave birth
  • Cuba 2014: Women age 15-49 who ever gave birth
  • Cuba 2019: Women age 15-49 who ever gave birth
  • Djibouti 2006: Ever-married women age 15-49 who ever gave birth
  • Dominican Republic 2014: Women age 15-49 who ever gave birth
  • Dominican Republic 2019: Women age 15-49 who ever gave birth
  • El Salvador 2014: Women age 15-49 who ever gave birth
  • Eswatini (Swaziland) 2014: Women age 15-49 who ever gave birth
  • Eswatini (Swaziland) 2021: Women age 15-49 who ever gave birth
  • Fiji 2021: Women age 15-49 who ever gave birth
  • Gambia 2005: Women age 15-49 who ever gave birth
  • Gambia 2010: Women age 15-49 who ever gave birth
  • Gambia 2018: Women age 15-49 who ever gave birth
  • Georgia 2005: Women age 15-49 who ever gave birth
  • Georgia 2018: Women age 15-49 who ever gave birth
  • Ghana 2006: Women age 15-49 who ever gave birth
  • Ghana (Accra) 2010: Women age 15-49 who ever gave birth
  • Ghana 2017: Women age 15-49 who ever gave birth
  • Guinea 2016: Women age 15-49 who ever gave birth
  • Guinea Bissau 2006: Women age 15-49 who ever gave birth
  • Guinea Bissau 2014: Women age 15-49 who ever gave birth
  • Guyana 2006: Women age 15-49 who ever gave birth
  • Guyana 2014: Women age 15-49 who ever gave birth
  • Guyana 2019: Women age 15-49 who ever gave birth
  • Honduras 2019: Women age 15-49 who ever gave birth
  • Indonesia (Papua) 2011: Women age 15-49 who ever gave birth
  • Indonesia (West Papua) 2011: Women age 15-49 who ever gave birth
  • Iraq 2006: Ever-married women age 15-49 who ever gave birth
  • Iraq 2011: Women age 15-49 who ever gave birth
  • Iraq 2018: Women age 15-49 who ever gave birth
  • Jamaica 2005: Women age 15-49 who ever gave birth
  • Jamaica 2011: Women age 15-49 who ever gave birth
  • Kazakhstan 2006: Women age 15-49 who ever gave birth
  • Kazakhstan 2010: Women age 15-49 who ever gave birth
  • Kazakhstan 2015: Women age 15-49 who ever gave birth
  • Kenya (Bungoma) 2013: Women age 15-49 who ever gave birth
  • Kenya (Kakamega) 2013: Women age 15-49 who ever gave birth
  • Kenya (Turkana County) 2013: Women age 15-49 who ever gave birth
  • Kiribati 2018: Women age 15-49 who ever gave birth
  • Kosovo 2013: Women age 15-49 who ever gave birth
  • Kosovo (Roma) 2013: Women age 15-49 who ever gave birth
  • Kosovo 2019: Women age 15-49 who ever gave birth
  • Kosovo (Roma) 2019: Women age 15-49 who ever gave birth
  • Kyrgyzstan 2005: Women age 15-49 who ever gave birth
  • Kyrgyzstan 2014: Women age 15-49 who ever gave birth
  • Kyrgyzstan 2018: Women age 15-49 who ever gave birth
  • Laos 2017: Women age 15-49 who ever gave birth
  • Lesotho 2018: Women age 15-49 who ever gave birth
  • Macedonia 2005: Women age 15-49 who ever gave birth
  • Macedonia (Roma) 2011: Women age 15-49 who ever gave birth
  • Macedonia 2018: Women age 15-49 who ever gave birth
  • Macedonia (Roma) 2018: Women age 15-49 who ever gave birth
  • Madagascar 2018: Women age 15-49 who ever gave birth
  • Malawi 2013: Women age 15-49 who ever gave birth
  • Malawi 2019: Women age 15-49 who ever gave birth
  • Mali 2015: Women age 15-49 who ever gave birth
  • Mauritania 2007: Women age 15-49 who ever gave birth
  • Mauritania 2015: Women age 15-49 who ever gave birth
  • Mexico 2015: Women age 15-49 who ever gave birth
  • Mongolia 2005: Women age 15-49 who ever gave birth
  • Mongolia (Khuvsgul Aimag) 2012: Women age 15-49 who ever gave birth
  • Mongolia (Nalaikh) 2012: Women age 15-49 who ever gave birth
  • Mongolia 2018: Women age 15-49 who ever gave birth
  • Montenegro (Roma) 2013: Women age 15-49 who ever gave birth
  • Montenegro 2013: Women age 15-49 who ever gave birth
  • Montenegro 2018: Women age 15-49 who ever gave birth
  • Montenegro (Roma) 2018: Women age 15-49 who ever gave birth
  • Nepal 2014: Women age 15-49 who ever gave birth
  • Nepal 2019: Women age 15-49 who ever gave birth
  • Nigeria 2007: Women age 15-49 who ever gave birth
  • Nigeria 2011: Women age 15-49 who ever gave birth
  • Nigeria 2016: Women age 15-49 who ever gave birth
  • Pakistan (Balochistan) 2010: Women age 15-49 who ever gave birth
  • Pakistan (Punjab) 2011: Women age 15-49 who ever gave birth
  • Pakistan (Sindh) 2014: Ever-married women age 15-49 who ever gave birth
  • Pakistan (Punjab) 2014: Ever-married women age 15-49 who ever gave birth
  • Pakistan (Gilgit-Baltistan) 2016: Ever-married women age 15-49 who ever gave birth
  • Pakistan (Khyber Pakhtunkhwa) 2016: Ever-married women age 15-49 who ever gave birth
  • Pakistan (Punjab) 2017: Women age 15-49 who ever gave birth
  • Pakistan (Sindh) 2018: Ever-married women age 15-49 who ever gave birth
  • Pakistan (Balochistan) 2019: Women age 15-49 who ever gave birth
  • Pakistan (Khyber Pakhtunkhwa) 2019: Women age 15-49 who ever gave birth
  • Palestine 2010: Women age 15-49 who ever gave birth
  • Palestine 2019: Ever-married women age 15-49 who ever gave birth
  • Paraguay 2016: Women age 15-49 who ever gave birth
  • Qatar 2012: Ever-married women age 15-49 who ever gave birth
  • Saint Lucia 2012: Women age 15-49 who ever gave birth
  • Samoa 2019: Women age 15-49 who ever gave birth
  • Sao Tome and Principe 2014: Women age 15-49 who ever gave birth
  • Sao Tome and Principe 2019: Women age 15-49 who ever gave birth
  • Senegal (Dakar City) 2015: Women age 15-49 who ever gave birth
  • Serbia 2005: Roma women age 15-49 who ever gave birth
  • Serbia 2010: Women age 15-49 who ever gave birth
  • Serbia (Roma) 2010: Women age 15-49 who ever gave birth
  • Serbia 2014: Women age 15-49 who ever gave birth
  • Serbia (Roma) 2014: Women age 15-49 who ever gave birth
  • Serbia (Roma) 2019: Women age 15-49 who ever gave birth
  • Serbia 2019: Women age 15-49 who ever gave birth
  • Sierra Leone 2005: Women age 15-49 who ever gave birth
  • Sierra Leone 2010: Women age 15-49 who ever gave birth
  • Sierra Leone 2017: Women age 15-49 who ever gave birth
  • Sudan 2014: Ever-married women age 15-49 who ever gave birth
  • Suriname 2006: Women age 15-49 who ever gave birth
  • Suriname 2018: Women age 15-49 who ever gave birth
  • Syria 2006: Ever-married women age 15-49 who ever gave birth
  • Tajikistan 2005: Women age 15-49 who ever gave birth
  • Thailand 2005: Women age 15-49 who ever gave birth
  • Thailand 2012: Women age 15-49 who ever gave birth
  • Thailand (Bangkok) 2015: Women age 15-49 who ever gave birth
  • Thailand 2015: Women age 15-49 who ever gave birth
  • Thailand (14 Provinces) 2016: Women age 15-49 who ever gave birth
  • Thailand (17 Provinces) 2019: Women age 15-49 who ever gave birth
  • Thailand 2019: Women age 15-49 who ever gave birth
  • Thailand 2022: Women age 15-49 who ever gave birth
  • Togo 2006: Women age 15-49 who ever gave birth
  • Togo 2010: Women age 15-49 who ever gave birth
  • Togo 2017: Women age 15-49 who ever gave birth
  • Tonga 2019: Women age 15-49 who ever gave birth
  • Trinidad and Tobago 2006: Women age 15-49 who ever gave birth
  • Trinidad and Tobago 2011: Women age 15-49 who ever gave birth
  • Trinidad and Tobago 2022: Women age 15-49 who ever gave birth
  • Turkmenistan 2006: Women age 15-49 who ever gave birth
  • Turkmenistan 2015: Women age 15-49 who ever gave birth
  • Turkmenistan 2019: Women age 15-49 who ever gave birth
  • Turks and Caicos 2019: Women age 15-49 who ever gave birth
  • Tuvalu 2019: Women age 15-49 who ever gave birth
  • Ukraine 2005: Women age 15-49 who ever gave birth
  • Uzbekistan 2006: Women age 15-49 who ever gave birth
  • Uzbekistan 2021: Women age 15-49 who ever gave birth
  • Vanuatu 2007: Women age 15-49 who ever gave birth
  • Vietnam 2006: Women age 15-49 who ever gave birth
  • Vietnam 2010: Women age 15-49 who ever gave birth
  • Vietnam 2020: Women age 15-49 who ever gave birth
  • Zimbabwe 2009: Women age 15-49 who ever gave birth
  • Zimbabwe 2014: Women age 15-49 who ever gave birth
  • Zimbabwe 2019: Women age 15-49 who ever gave birth

Availability

  • Afghanistan: 2010, 2022
  • Albania: 2005
  • Algeria: 2018
  • Argentina: 2011, 2019
  • Bangladesh: 2012, 2019
  • Barbados: 2012
  • Belarus: 2005
  • Belize: 2006, 2011
  • Benin: 2014, 2021
  • Bhutan: 2010
  • Bosnia and Herzegovina: 2011
  • Bosnia and Herzegovina (Roma): 2011
  • Burkina Faso: 2006
  • Burundi: 2005
  • Cameroon: 2014
  • Central African Republic: 2006, 2010, 2018
  • Chad: 2010, 2019
  • Comoros: 2022
  • Congo: 2014
  • Congo Democratic Republic: 2010, 2017
  • Costa Rica: 2018
  • Cote D'Ivoire: 2016
  • Cuba: 2010, 2014, 2019
  • Djibouti: 2006
  • Dominican Republic: 2014, 2019
  • El Salvador: 2014
  • Eswatini (Swaziland): 2014, 2021
  • Fiji: 2021
  • Gambia: 2005, 2010, 2018
  • Georgia: 2005, 2018
  • Ghana: 2006, 2017
  • Ghana (Accra): 2010
  • Guinea: 2016
  • Guinea Bissau: 2006, 2014
  • Guyana: 2006, 2014, 2019
  • Honduras: 2019
  • Indonesia (Papua): 2011
  • Indonesia (West Papua): 2011
  • Iraq: 2006, 2011, 2018
  • Jamaica: 2005, 2011
  • Kazakhstan: 2006, 2010, 2015
  • Kenya (Bungoma): 2013
  • Kenya (Kakamega): 2013
  • Kenya (Turkana County): 2013
  • Kiribati: 2018
  • Kosovo: 2013, 2019
  • Kosovo (Roma): 2013, 2019
  • Kyrgyzstan: 2005, 2014, 2018
  • Laos: 2017
  • Lesotho: 2018
  • Macedonia: 2005, 2018
  • Macedonia (Roma): 2011, 2018
  • Madagascar: 2018
  • Malawi: 2013, 2019
  • Mali: 2015
  • Mauritania: 2007, 2015
  • Mexico: 2015
  • Mongolia: 2005, 2018
  • Mongolia (Khuvsgul Aimag): 2012
  • Mongolia (Nalaikh): 2012
  • Montenegro: 2013, 2018
  • Montenegro (Roma): 2013, 2018
  • Nepal: 2014, 2019
  • Nigeria: 2007, 2011, 2016
  • Pakistan (Balochistan): 2010, 2019
  • Pakistan (Punjab): 2011, 2014, 2017
  • Pakistan (Sindh): 2014, 2018
  • Pakistan (Gilgit-Baltistan): 2016
  • Pakistan (Khyber Pakhtunkhwa): 2016, 2019
  • Palestine: 2010, 2019
  • Paraguay: 2016
  • Qatar: 2012
  • Saint Lucia: 2012
  • Samoa: 2019
  • Sao Tome and Principe: 2014, 2019
  • Senegal (Dakar City): 2015
  • Serbia: 2005, 2010, 2014, 2019
  • Serbia (Roma): 2010, 2014, 2019
  • Sierra Leone: 2005, 2010, 2017
  • Sudan: 2014
  • Suriname: 2006, 2018
  • Syria: 2006
  • Tajikistan: 2005
  • Thailand: 2005, 2012, 2015, 2019, 2022
  • Thailand (Bangkok): 2015
  • Thailand (14 Provinces): 2016
  • Thailand (17 Provinces): 2019
  • Togo: 2006, 2010, 2017
  • Tonga: 2019
  • Trinidad and Tobago: 2006, 2011, 2022
  • Turkmenistan: 2006, 2015, 2019
  • Turks and Caicos: 2019
  • Tuvalu: 2019
  • Ukraine: 2005
  • Uzbekistan: 2006, 2021
  • Vanuatu: 2007
  • Vietnam: 2006, 2010, 2020
  • Zimbabwe: 2009, 2014, 2019