Clinical Outcomes of Slow Developing Blastocysts — LATEBLOOM  

Infertility Clinical Trial

Official title: Pregnancy Outcomes in Patients With Slow Developing Blastocysts: What is the Best Transfer Strategy? A Prospective Randomized Controlled Trial

Status Terminated

Clinical Trial Summary

This study evaluates which transfer strategy will result in a higher probability of pregnancy in patients whose single best day 5 embryo resulting from an IVF cycle is classified as expansion grade <4 by Gardner and Schoolcraft classification. All cycles will be cultured to day 6 and half the patients will undergo a fresh embryo transfer and the other half a frozen embryo transfer.

Clinical Trial Description

A lack of established markers for predicting blastocyst development increases the risk of having no embryos or embryos not-fully expanded available for transfer. Slower but non-arrested embryos are frequently found to have progressed to blastocyst stage by the time of a day 6 transfer. In the absence of a receptive endometrium, embryo selection for fresh transfer may be futile, and cryopreservation could be a better option. The objective is to determine which transfer strategy will result in a higher probability of pregnancy in patients whose single best day 5 embryo resulting from an IVF cycle is classified as expansion grade <4 by Gardner and Schoolcraft classification. The investigators hypothesize that in bad prognosis patients with slow-developing blastocysts, vitrified-warmed embryo transfer will result in higher implantation, clinical and ongoing pregnancy and live birth rates than fresh embryo transfer. ;

Related Conditions & MeSH terms

• Infertility

• NCT number: NCT03360097
• Study type: Interventional
• Source: Institut Universitari Dexeus
• Status: Terminated
• Phase: N/A
• Start date: December 1, 2017
• Completion date: May 30, 2018