TY - BOOK ED - United States TI - Population sciences U1 - 016.6126 PY - 1980/// CY - Washington, D.C. PB - National Institute of Child Health and Human Development KW - Human reproduction KW - Bibliography KW - Indexes KW - Population biology KW - Contraception KW - Fertility KW - Infertility KW - Reproduction KW - Steroids N1 - "Index of biomedical research."; Preceded by two experimental issues ER -