As a result of this analysis, on the one hand the authors did not reveal reliable causal relationships between reproductive hormone levels and endometriosis; on the other hand, what was a surprise for them were the revealed pleiotropic genetic associations of the two loci of the FSHB subunit promoter (rs11031002 and rs11031005) with endometriosis and sex hormone levels [18]. This evidence concerns the gene FSHB and endometriosis.