Data Collection
Age, BMI, years of infertility, mean number of previous fresh and frozen embryos transferred per patient, mean number of oocytes retrieved or donated, mean number of MII oocytes inseminated, fertilization rate per inseminated oocyte, mean number of embryos available per oocyte pick-up, mean endometrial thickness, mean number of days for endometrial preparation, number of total ET, and number of frozen embryos transferred were recorded.
We determined the benefit of testing in terms of (1) mean implantation rate per transferred embryo defined as the number of gestational sacs divided by the number of embryos transferred, and (2) ongoing pregnancy rate per transferred embryo defined as positive pregnancy beyond 12 weeks gestation confirmed by ultrasound with fetal heart activity divided by the number of embryos transferred.