Motherhood and childlessness in monozygous twins. II. The influence of motherhood on health.
D000328:Adult; D000367:Age Factors; D004200:Diseases in Twins / Q000453:epidemiology; D005260:Female; D005306:Fertilization; D005831:Genital Diseases, Female / Q000209:etiology; D006801:Humans; D008393:Marriage; D001523:Mental Disorders / Q000209:etiology; D008875:Middle Aged; D009017:Morbidity; D010063:Ovum; D010298:Parity; D011247:Pregnancy; D011569:Psychiatric Status Rating Scales; D012930:Social Dominance; D014427:Twins