Estimates of fecundability

Abstract

Estimates of fecundability, the probability of becoming pregnant during a single menstrual cycle, have recently been put forward, based on estimates derived from conception delays. Two new methods of estimation are put forward in this paper, and it is suggested that previous authors were led to overestimate the length of the fertile period during any menstrual cycle.

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Notes on contributors

W. H. James

I am grateful to Dr. Good both for his generosity in providing me with the method here described, and for his patience in answering my questions. I am grateful too to Mr. Brass who most courteously answered my questions about his distribution, This work was supported by a Canadian Federal Health Grant and is part of the Spontaneous Abortion Project of Dalhousie University Medical School.