About the Data
Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.
Number of females aged 15 to 44 years whose most recent pregnancy was conceived within 18 months of a previous live birth
Number of females aged 15 to 44 years with at least two pregnancies
From the 2006 National Survey of Family Growth:
[If a current pregnancy:] How many weeks or months pregnant are you now?
[If a completed pregnancy:] How many months or weeks had you been pregnant when (the baby was born / that pregnancy ended)?
-Pregnancy conception date for the most recent pregnancy is defined by DATECON, a recode constructed from DATEND and PRGLNGTH for completed pregnancies and date of interview and PRGLNGTH for current pregnancies.
[NUMERATOR and DENOMINATOR:]
-Total number of pregnancies [PREGNUM recode based on the question below]
(Including this pregnancy,) how many times have you been pregnant in your life?
-Century Month for Pregnancy End Date (including live birth) [DATEND recode based on the question below]
In what month and year (did this pregnancy end / was this baby born)?
-Gestational length of pregnancy (in weeks) [PRGLNGTH recode, defined for both current and completed pregnancies]
-For each pregnancy, a recode OUTCOME is defined to indicate pregnancy outcome as shown below:
- Live birth
- Induced Abortion
- Still birth
- Ectopic pregnancy
- Current pregnancy
A female is considered to have had a pregnancy within 18 months of a previous birth if she had at least 2 pregnancies and the 2nd most previous pregnancy ended in a live birth. The most recent pregnancy can be a current pregnancy.
The interval between the most recent pregnancy and previous live birth is derived from the delivery date of the live birth and the date of conception for the most recent pregnancy’s conception.
Any change to the objective text, baseline, target, target-setting method or data source since the Healthy People 2020 launch.