Fertility Trends Among U.S. Who Defer Childbearing Past Age 30
Martin, Steven P. Working paper no. 1999-11 Abstract In 1975-79, U.S. women childless at age 30 had low fertility after age 30. Under age- and parity-specific birth rates for 1975-79, such women would average 0.35 first births and 0.6 total births by age 45. By 1990-95, more women of most educational levels remained childless to …