| Abstrakt: |
TO THE EDITOR:— I believe the paper "Statistical Method for Determination of Ovulation Time in Women" by Murray (J. A. M. A.170:42-43 [May 2] 1959) is based on a series of erroneous concepts which need to be clarified in order not to perpetuate the confusion which obscures the relationship in time between ovulation and menstruation. The author equates the day of insemination with the day of ovulation. This is an assumption for which, except for a few doubtful observations, there is no proof in the human female (Bergman: Acta. Obst, et gynec. scandinav. [supp. 4] 29:1, 1950). He assumes the length of the menstrual cycle to be an independent variable on which, correspondingly, the length of the preovulatory or postmenstrual phase depends. In fact, the relationship is inverse; the length of the menstrual cycle depends on the length of the preovulatory phase (Hartman: World of Obst. Gynec. |
