<unk>  and other stilbestrol were used as synthetic estrogens in order to prevent premature births. Based on the idea that premature births happened because the mother did not produce enough estrogen on her own, doctors prescribed<unk>  to mothers in order to increase their estrogen levels. Studies have been done in the past on normal, mature and castrate female rats.<unk>  produced the same type of estrus in the castrate rat when injected at 0.8 to 1.0 micrograms as when the rat was injected with 2.0 to 2.5 micrograms of estrone. This is significant because less<unk>  could be used to produce the same effect as estrone in increasing estrogen production. It has been used in the past as a nonsteroidal estrogen antagonist.
Benzestrol
Hexestrol
Fosfestrol
Dienestrol
Moxestrol
Gestodene
Dimestrol
Allenestrol