title: The biological effects of family planning. D. Some reflections on the biological consequences of family planning.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002869:Chromosome Aberrations; D004314:Down Syndrome / Q000453:epidemiology; D005193:Family Planning Services; D005260:Female; D005298:Fertility; D005313:Fetal Death; D005828:Genetics, Population; D006801:Humans; D007564:Japan; D008297:Male; D008423:Maternal Age; D009154:Mutation; D011247:Pregnancy; D012641:Selection, Genetic; D006113:United Kingdom; D014481:United States