The impact of two different thaw protocols on outcomes of vitrified cleavage-stage embryos transfer.

The objective of this study was to evaluate the gestational results obtained with vitrified-thawed human cleavage-stage embryo by two different thaw protocols. Embryo development was observed to cleavage-stage and embryos were cryopreserved by vitrification on day 3 after oocyte retrieval. 51 cycles were thawed using vitrification warming kit with decreasing concentrations of sucrose in 3 dilutions ( 1.

Successful pregnancy following the transfer of vitrified blastocyst which developed from poor quality embryos on day 3.

Background: The selection of pre-embryos for transferred is based on morphological appearance. But some poor quality cleaved embryos also can be cultured to the blastocyst stage and implanted.

Objective: To assess the clinical pregnancy outcomes of blastocyst transfer which developed from poor quality embryos.

Effect of the size of zona pellucida thinning by laser assisted hatching on clinical outcome of human frozen-thawed embryo transfers.

Of 122 consecutive procedures, 31 were not assisted hatching (AH), which served as the control group, 34 were AH with 40 microm thinning of the zona, and 57 were AH with 80 microns of the zona thinning. The pregnancy and implantation rates were significantly higher in 80 microns thinning group compared to control group (40.3 vs.