Endometrial biopsy in the cycle of conception.

The pregnancy outcome of 18 infertile patients inadvertently biopsied during the cycle of conception is reviewed. Fourteen patients delivered term infants, one a premature infant; one patient aborted during the first trimester, and two patients were lost to follow-up. The pregnancy outcome was better than that frequently quoted for infertile patients. A comparison of the present series with those previously reported is made and the author's technique for endometrial biopsy is discussed. The average duration of gestation is calculated using the endometrial biopsy.