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Summary. Recently, Sevag & Colton (1959) published a chemical test for detecting the precise day of ovulation. We have performed this test in 112 menstrual cycles of sixty women. Out of 112 menstrual cycles studied, in fifty-six menstrual cycles (50%) the chemical patterns were atypical. We do not substantiate the claim of Sevag & Colton that the ovulation invariably occurs between 10th and 14th days of menstrual cycle. This test needs further confirmation from other tests such as endometrial biopsy carried out simultaneously.

PRELIMINARY OBSERVATIONS ON THE CHEMICAL METHOD FOR THE DETECTION OF OVULATION