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1: Contraception. 1985 Mar;31(3):275-93.Links

Interception II: postcoital low-dose estrogens and norgestrel combination in 633 women.

The new low-dose hormonal postcoital method, a combination of 200 mcg ethinylestradiol and 2 mg norgestrel was used in 633 women, and a statistically significantly lower observed pregnancy rate was found compared to the expected number of pregnancies if no contraception was used. Patterns of menstruation, its onset and duration, after use of this morning-after pill, are documented in respect to follicular, midcycle and luteal administration. Individual side effects such as nausea, vomiting and mastalgia are noted, but antiemetics did not reduce the incidence. Though efficacy of this technique is not found to be favorable in comparison to the 5 mg ethinylestradiol treatment, the low-dose of steroid, the one-day treatment and its lesser side effects show this alternative morning-after pill suitable for use as a first choice in case of an unprotected sexual encounter.

PMID: 3995963 [PubMed - indexed for MEDLINE]

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