Assertion: contraceptive's estrogen | /r/Synonym | synthetic progesterone
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Source sentences:
text: It contains two active ingredients: a synthetic estrogen called ethinyl estradiol and a synthetic progesterone called norethindrone.
text: In general, combination hormonal contraceptives contain a synthetic estrogen (to stabilize the endometrium and reduce unwanted spotting) and a progestin (for its contraceptive effects).
text: It contains two compounds similar to female hormones -- a synthetic estrogen called ethinyl estradiol and a synthetic progestin called levonorgestrel -- which prevent ovulation (the release of eggs from the ovaries).
text: Nortrel is a birth control pill that contains two compounds similar to female hormones -- a synthetic estrogen called ethinyl estradiol and a synthetic progesterone called norethindrone.