[Problems of pregnancy and delivery among adolescent girls and their countermeasures].
D000028:Abortion, Induced; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001724:Birth Weight; D036861:Delivery, Obstetric; D005260:Female; D005313:Fetal Death; D006801:Humans; D007086:Illegitimacy; D008875:Middle Aged; D049590:Postpartum Period; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology; D011295:Prenatal Care