the biotransformation of estradiol ( e2 ) and estrone ( e1 ) in the uterus of rabbits treated with norgestrel ( ng ) , norethindrone ( net ) , norethindrone acetate ( neta ) , progesterone ( p4 ) , and e2 either by subcutaneous injection in oil or by intrauterine steroid-releasing silastic implants was carried out under an in vitro short-term incubation system .
C0028356
norethindrone
C0068980
norethindrone acetate