Day 2 and day 3 transfer in in vitro fertilization

Due to the lack of adequate media which could support embryo in vitro development in early IVF procedure day 2 transfer has been a dominated procedure, however, day 3 transfer is more physiological. A group of 131 infertile couples was subjected to classical IVF or ICSI in equal proportion. Average age of both groups was comparable and in the all cycles the long protocol of stimulation was applied. There were no statistical differences in proportion of class A to B embryos in a group with day 2 transfer ( resp.: 65.2 % and 30.4 %) and in a group with day 3 transfer ( resp.: 63.5 % and 30.8 %).Similar rates of pregnancies per cycle were also obtained - 25.4 % and 25.0 % respectively. Conclusions: Performed analysis did not indicate statistical significant differences in laboratory and clinical data for both studied groups.