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Human Reproduction, Vol 12, 1945-1948, Copyright © 1997 by Oxford University Press


ARTICLES

A prospective, randomized, cross-over comparison of two methods of artificial insemination by donor on the incidence of conception: intracervical insemination by straw versus cervical cap

PA Flierman, HV Hogerzeil and DJ Hemrika
Department of Obstetrics and Gynaecology, O.L. Vrouwe Gasthuis, Amsterdam, The Netherlands.

In a prospective, randomized study of insemination with donor semen, intracervical insemination by straw was compared with insemination using a cervical cap with an intracervical reservoir. A total of 91 patients completed 486 treatment cycles. There were no significant differences in age, parity, indication for insemination by donor, or method of cycle monitoring between women who became pregnant and those who did not conceive with either insemination method. In 236 standard intracervical insemination cycles, 14 patients became pregnant (5.9% per cycle), whereas 38 patients conceived in 250 cervical cap cycles (15.2% per cycle). Both the crude pregnancy rates and the cumulative pregnancy rates calculated by the Kaplan-Meier life-table method were significantly different (chi(2)-test, P < 0.001, and log-rank test, P < 0.005 respectively). Pregnancy rates in artificial insemination with cryopreserved donor semen may be improved by the use of a cervical cap when compared to cervical insemination by straw. The use of the cervical cap may prolong the exposure of the spermatozoa to the cervical mucus and prevent the backflow of semen into the vagina.
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A. F. Khattab, F. A. Mustafa, and P. J. Taylor
The use of urine LH detection kits to time intrauterine insemination with donor sperm
Hum. Reprod., September 1, 2005; 20(9): 2542 - 2545.
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