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Chances of spontaneous conception Cause of infertility Amenorrhoea Tubal obstruction Other tubal disease Endometriosis Stg I and II Endometriosis Stg III & IV Azoospermia Oligozoospermia Unexplained Live birth at 3 years 6% 5% 22% 25% 10% 5% 32% 36% Collins & Van Steirteghem, 2004 Factors predictive of spontaneous pregnancy 3 sample synthesis model (Eimers, Collins, Snick) Variable OR (95% CI) Age 0.95 (0.93, 0.98) Duration 0.83, (0.78, 0.88) Previous pregnancy 1.79, (1.46, 2.19) 10% increase in sperm motility 1.08 (1.04, 1.13) Hunault et al. 2004 16 PRECONGRESS COURSE 09 I VIENNA, AUSTRIA – 23 JUNE 2019 19