Association of each variable with pregnancy outcome.

*Positive and negative estimates indicate association with positive and negative pregnancy outcomes, respectively.
†Clinical infertility diagnoses that were not significantly associated with pregnancy outcome (p-value >0.05) were not listed: uterine factor, polycystic ovarian syndrome, endometriosis, tubal ligation, tubal disease, hydrosalpinges, unexplained infertility, and “other diagnoses”. Each IVF case may have more than one clinical infertility diagnosis.
‡Cleavage arrest rate is defined as the percentage of embryos with 4 or fewer cells on Day 3 of in vitro culture.
§Day 5 embryo transfer is arbitrarily listed under Parameters of Transferred Embryos. It can also be considered an Embryo Cohort Parameter, as it depends on the total number of embryos and the number of 8-cell embryos.