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PREGDUR_ALL (B20_x) variables are 2-digit numeric variables.


99 = NIU (not in universe)


PREGDUR_ALL (B20_x) reports the duration of the pregnancy (in months) before the child was born, for children born in the three to five years before the survey.

PREGDUR_ALL consists of a set of up to six separate variables, covering the most recent birth (PREGDUR_01) up to the sixth-most-recent birth (PREGDUR_06) for a female respondent of childbearing age. If PREGDUR_ALL is included in a data extract, all these separate variables are included in a researcher's data file.

Information for this variable was collected on all births for a woman within a specified number of years before the survey, up to a maximum of six births. In many cases, data were hypothetically collected on up to six births, but no women in the survey had so many births (e.g., no woman had 5 or 6 births within five years). If, for example, no woman in a survey had 6 births in the past five years and only blank values were included in the original DHS file, then PREGDUR_06 would not be available for that survey in IPUMS-DHS.


Apart from universe differences, PREGDUR_ALL (B20_x) has no comparability problems.

Comparability - Standard DHS

PREGDUR_ALL (B20_x) is included in Phase VII forward of the standard DHS questionnaire.


  • Women age 15-49 with at least one birth in the 5 years before the survey.
  • Angola: 2015-W, 2015-W
  • Benin: 2017-W, 2017-W
  • Burundi: 2016-W, 2016-W
  • Ethiopia: 2016-W, 2016-W
  • Jordan: 2017-W, 2017-W
  • Malawi: 2016-W, 2016-W
  • Mali: 2018-W, 2018-W
  • Nepal: 2016-W, 2016-W
  • Nigeria: 2018-W, 2018-W
  • Senegal: 2017-W, 2017-W
  • South Africa: 2016-W, 2016-W
  • Uganda: 2016-W, 2016-W
  • Zambia: 2018-W, 2018-W
  • Zimbabwe: 2015-W, 2015-W