Luteinizing Hormone Activity in Plasma during the Menstrual Cycle

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Science  31 Mar 1967:
Vol. 155, Issue 3770, pp. 1679-1680
DOI: 10.1126/science.155.3770.1679


Daily determinations of luteinizing hormone activity in plasma throughout a menstrual cycle in ten young women showed a sharp peak of activity lasting less than 48 hours around midcycle and higher mean values during the follicular phase than during the luteal phase in nine instances.

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