Spontaneous abortion and birth order.
D000022:Abortion, Spontaneous; D000328:Adult; D000367:Age Factors; D001290:Attitude; D001722:Birth Order; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D003267:Contraception; D005260:Female; D005865:Gestational Age; D006801:Humans; D008393:Marriage; D008423:Maternal Age; D008568:Memory; D011247:Pregnancy; D011336:Probability; D013223:Statistics as Topic