ULTRASONOGRAPHY IN PREGNANCY--AN ENQUIRY INTO ITS SAFETY.
D000818:Animals; D001001:Anura; D000013:Congenital Abnormalities; D005399:Fishes; D011247:Pregnancy; D011270:Pregnancy, Animal; D012106:Research; D014465:Ultrasonics
ABNORMALITIES; EXPERIMENTAL LAB STUDY; FISHES; FROGS; PREGNANCY; PREGNANCY, ANIMAL; ULTRASONICS