@Article{, title={Although Late; but the First, an Iraqi Success in Human Embryo Cryopreservation Using Vitrification and the Factors Affecting the Pregnancy Rate: Cross-Sectional Study}, author={Thuraya H. Abdulla and Ula M. Al-Kawaz and Ali I. Rahim}, journal={Iraqi Journal of Embryos and Infertility Researches المجلة العراقية لبحوث الأجنة والعقم}, volume={8}, number={1}, pages={10-21}, year={2018}, abstract={Background: it is important to study a history of the science to appreciate thepast as a motive for hard work in the present for better future. In the other hand,the factors affecting pregnancy rate of frozen embryos are yet to be clarified atdifferent embryonic developmental stages.Objectives: to record a brief history of embryo cryopreservation in Iraq and tostudy many clinical and embryological factors that might affect the pregnancyrate.Subjects, materials and Method: a cross-sectional study of many clinical and embryologicalvariable, where120 frozen-thawed embryo transfer cycles enrolled inthe study at the period from January 2017 till July 2018. The variables were statisticallyanalyzed first by one factor analysis comparing between pregnant andnon-pregnant cases; then by multivariate logistic regression analysis to illustratemain factors without a possible confounder effect.Results: In one factor analysis, the following variables showed a significantlyhigh effect on pregnancy rate (P value <0.001) which are women’s age, women’sweight, number of retrieved oocytes, mature oocytes and good quality embryos,developmental stage, E2 level, and endometrial thickness. While in multivariatelogistic regression analysis the women’s weight, the number of retrieved oocytesand good quality embryos were the main factors.Conclusions: it is judiciously to consider these factors while managing infertilecouples with embryo cryopreservation programs especially the modifiable factors.

} }