GREB1L and Mayer-Rokitansky-Kuster-Hauser syndrome: This revealed one pathogenic variant in twin 3-1 (affected) and twin 3-2 (renal agenesis without features of MRKH), carrying a stop variant in GREB1L (ENST00000269218.10):c.4665T>A, p.Tyr1555* (Table 2).