الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Selection of embryos for transfer after thawing is very important. Doctors can select the timing of embryo thawing and transfer, and the possibility of cycle cancellation can be dramatically reduced.There are two sorts of selection of thawed embryos for transfer: using morphology according to intact blastomeres after thawing or using resumption of mitosis after extended culture.Extended culture was used to select viable embryos after thawing according to resumption of mitosis, however, it is more expensive than short time post thaw culture and amplify environmental effect on stressed thawed embryo. A short time culture of thawed embryos with selection of embryos according to morphology reducing cost and environmental effect on thawed embryos.This study aimed to compare effect of extended post thawing culture versus immediate post thawing transfer on clinical pregnancy rate.Our study was designed as a prospective randomized clinical trial. It was conducted on 150 patients were divided into two treatment groups. The first group underwent Immediate post thaw transfer, on other hand the second group underwent delayed thawed embryo transfer after long time culture.Results obtained are statistically analyzed and revealed no significant difference between the two groups regarding the clinical pregnancy rate.This study was concluded that; immediate thawed embryo transfer based on morphological selection was convenient and reduced the cost of the procedure with comparable clinical pregnancy rate compared to extended culture with mitosis resumption based selection