Reproductive performance in twin sisters.
D001724:Birth Weight; D005260:Female; D005313:Fetal Death / Q000235:genetics; D006801:Humans; D008297:Male; D011225:Pre-Eclampsia / Q000235:genetics; D011247:Pregnancy; D011272:Pregnancy, Multiple; D012098:Reproduction; D014427:Twins; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic