title: Effects of extensive population screening on the outcome of twin pregnancies.
mesh_terms: D001724:Birth Weight; D005260:Female; D005313:Fetal Death / Q000517:prevention & control; D005823:Genetics; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D007234:Infant, Premature; D007236:Infant, Small for Gestational Age; D008403:Mass Screening; D010928:Placental Lactogen / Q000097:blood; D011247:Pregnancy; D011272:Pregnancy, Multiple; D011295:Prenatal Care; D011296:Prenatal Diagnosis; D012146:Rest; D014427:Twins; D014463:Ultrasonography
chemical_list: D010928:Placental Lactogen