Infertility: diagnostic categories Anovulation Male factor Tubal factor Endometriosis Unexplained 1374 (20%) 2315 (34%) 1316 (20%) 277 (4%) 1514 (22%) Maheshwari et al, Hum. Reprod. 2008 12 PRECONGRESS COURSE 09 I VIENNA, AUSTRIA – 23 JUNE 2019 15