testosterone ( t ) and dihydrotestosterone ( dht ) in the amniotic fluid ( af ) and foeto-placental membranes ( fpm ) ( yolk-sac + amnion ) from 180 male and female guinea-pig foetuses were determined by radioimmunoassay on days 28 , 32 , 36 , 40 , 44 , 48 , 52 , 56 , 60 , 64 of gestation .
C0039601
testosterone
C0032961
gestation