O-24: The Impact of Embryo Scores on Pregnancy Rate in Mother's Clinic in Tabriz

Background: One of the main problems in ART is low pregnancy rates. The factors involved in successful pregnancy include; 1. mother related factors such as the status of endometrial receptivity and hormonal status of the mother. 2. embryo related factors such as; number of transferred embryo, embryo scores including: number and size of the blastomeres, and their fragmentation. The aim of the present study is to study the impact of embryo scores on pregnancy rates. Materials and Methods: For this purpose, the number of ICSIs which were carried out in the Mother's Clinic during 2012, the number of registered pregnancies and score of transferred embryos were collected. The association between different scores and pregnancy were studied. Results: The study revealed that 700 ICSI were carried out and pregnancy rate were 26%. From these; 15% were single embryo transfer, 15% were 2 embryo transfer, 48% were 3 embryo transfer and 22% were 4 embryo transfere. Based on the symmetry of blastomere size 70% were A, 26% were B and 4% were C. According to the number of blastomeres 11% were 4 cell or less, 22% were 6 cell, and 67% were 8 cell embryos. Regarding blastomere fragmentation 56% were grade 1, 22% were grade 2, and 22% were grade 3. Conclusion: It is concluded that the suitable scores that may result in pregnancy are: 3 embryos, A symmetry, 8 cell embryos, and grade 1 fragmentation.