Fertility, Human Population 111 Birth control 70 History 54 Women 38 Family size 33 Fertility 32 more ... Social aspects 27 Social conditions 27 Economic aspects 26 Population policy 26 Human reproduction 22 Demographic transition 20 Demography 20 Families 19 Government policy 17 Economic conditions 13 Contraception 12 Health and hygiene 12 Infertility 12 Education 11 Family planning services 10 Human reproductive technology 10 Mortality 10 Reproductive health 10 Economic development 9 Employment 8 Marriage 8 Sex role 8 Social life and customs 8 less ...