BRD2 and endometriosis: In summary, FSHR with completely wild-type homozygous SNPs at positions 307 and 680 (307Thr/Thr680Asn/Asn) had higher sensitivity to FSH and an increased risk of endometriosis, whereas FSHR possessing at least an allele of mutant SNP at positions 307 and 680 lower risk of endometriosis.