Trends and variations in first births to older women, United States, 1970-86.

Trends and variations in first-time childbearing women in their thirties and older are presented for the years 1970-86. The report focuses on the decline in childbearing by women in their twenties, particularly well-educated women, and the extent to which these women have delayed motherhood. Maternal and infant health characteristics are also discussed. The information presented is drawn from the live birth certificates of all states and the District of Columbia.