No advantage of fresh blastocyst versus cleavage stage embryo transfer in women under the age of 39: a randomized controlled study.

ABSTRACT: PURPOSE:Is there a difference in implantation and pregnancy rates between embryos transferred electively at cleavage or blastocyst stage in infertile women ≤ 38 years with at least four zygotes on day 1 post retrieval? METHODS:A randomized clinical trial was conducted in a single tertiary care hospital with a sample size of 194 patients in each arm for a total population of 388 women. Patients less than 39 years of age with more than three fertilized oocytes and less than four previous assisted reproductive technology (ART) attempts were inclusion criteria. RESULTS:The two groups were similar for age, years of infertility, indication to treatment, basal antimüllerian hormone and FSH, number of previous ART cycles, primary or secondary infertility, type of induction protocol, days of stimul

SUBMITTER: Levi-Setti PE 

PROVIDER: S-EPMC5904063 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature