The National Survey of Family Growth (NSFG), Cycle IV, 1988 & 1990 Telephone Reinterview is the fourth in a series of periodic studies of women 15-44 years of age. Topics include timing of first intercourse; pregnancy, contraceptive, marital, and cohabitation histories; employment and occupation; child care, fecundity, and sterility; wantedness of pregnancies; adoption; prenatal medical care; family planning services; birth expectations; AIDS and HIV knowledge; ethnicity; religion; and income.

This data set contains merged data for the survey conducted at two separate points in time: 1988 when 8,450 respondents were interviewed in person and 1990 when 5,686 respondents (5,359 of whom participated in the 1988 survey, and 327 first-time teen respondents) were interviewed by telephone.

To simplify longitudinal analyses, data from the 1988 NSFG Cycle IV and the 1990 Telephone Reinterview were then merged using respondent ID to create a single rectangular data file that contains both waves of data collection. The combined 1988 and 1990 NSFG contains data from 8,777 respondents and 3,462 variables (2,430 assessed in 1988 and 1,032 assessed in 1990).