Abstract

Intravenous infusion of PGF2α, 0.75 μg per kilogram per minute for 3.5 to 6 hours, during the midluteal phase of the normal menstrual cycle, resulted in a transient diminution in circulating progesterone and estradiol levels in four out of seven subjects. This effect did not result in a significant shortening of the menstrual interval or luteal phase. The effect appeared to be directly at the ovarian level since there was no correlation of alterations in steroid values with LH or FSH changes. Because of serious gastrointestinal side effects and only transient effects on luteal function, it does not appear that systemically administered PGF2α can be used as a luteolytic agent during the normal menstrual cycle.

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