RESUMO
Today, the donation of embryos, produced in vitro, is a common way to help the infertile cases who cannot produce embryo themselves by any of assisted reproductive procedures. The quality of endometrium and the time of embryo transfer are the most important factors in achieveing high pregnancy rate in these cases. The aim of this study was the assessment of pregnancy rate after embryo donation in natural cycle. This descriptive study was carried out in the year 2005 at Hamadan Infetility Center on 24 couples. A total of 24 couples went through the treatment cycles with embryos donated by 17 couples. Embryo donation was done on days of 14-17 of natural cycle and 2-3 days after the progesterone administration to the recipients. A pregnancy test was performed 2 weeks after ET, and positive results were confirmed by sonographic evaluation of the embryo. Individual, hormone administration results and embryo donation data were collected in a questionnaire, analyzed by descriptive statistics and frequency distribution tables. The mean age of the recipient and donor women were 32.2 and 26.2 years respectively.An average of 2.3 embryos were transferred on each occasion. The clinical pregnancy rate in the recipients was 30% [8.24] per embryo transfer. Transfer of donated embryos in natural cycle, results in a high pregnancy rate and is an easy, acceptable and cost-effective way of treatment for infertility