The p53 codon 72 single nucleotide polymorphism lacks a significant effect on implantation rate in fresh in vitro fertilization cycles: an analysis of 1,056 patients.

OBJECTIVE: To determine whether the p53 codon 72 single nucleotide polymorphism, a change of the amino acid arginine (Arg) to proline (Pro) resulting from a single nucleotide mutation of guanine (G) to cytosine (C), has a clinically significant effect on implantation rate in fresh IVF cycles.
DESIGN: Prospective cohort analysis.
SETTING: University-affiliated private IVF center. PATIENT(S): One thousand fifty-six female patients undergoing fresh nondonor IVF cycles. MAIN OUTCOME MEASURE(S): Embryo implantation rate. RESULT(S): Of the 1,056 patients (2,600 total embryos transferred) undergoing their first IVF cycle, 289 had no implantation events and attempted a second cycle. Of the 289 patients in their second cycle, 72 had no implantation events and attempted a third cycle. The p53 codon 72 single nucleotide polymorphism frequencies in the first cycle (homozygous major allele Arg/Arg [G_G] = 45%, heterozygous allele Arg/Pro [G_C] = 44%, and homozygous minor allele Pro/Pro [C_C] = 11%) did not differ significantly across subsequent IVF cycles. There was no statistically significant difference in embryo implantation rate with respect to the single nucleotide polymorphism. CONCLUSION(S): The p53 codon 72 single nucleotide polymorphism lacks a clinically significant effect on embryo implantation rate in patients undergoing fresh nondonor IVF cycles.