Objective:This study aimed to identify which parameters positively affect the clinical
pregnancy rates of IUI cycles and find which couples should opt for IUI.Methods:This retrospective observational study included 261 patients submitted to 381
IUI cycles with fresh or cryopreserved partner semen (IU-H) from January
2012 to February 2017 in a private center in Curitiba-PR, Brazil.Results:Idiopathic infertility was the most frequent finding (35.9%). Patients
younger than 40 years accounted for 87.9% of the IUI cycles (n=335) and
16.1% of the clinical pregnancies (n=54). The pregnancy rate was three times
higher in patients with an endometrium thickness ≥8 mm compared to
patients with endometrium thickness <8mm. Sperm motility >55% was
linked to higher pregnancy rates (p=0.002). Concerning
gonadotropins, 159 (48.4%) took rFSH, 127 (38.7%) hMG, and 42 (12.8%) uFSH,
with pregnancy rates of 21.3%, 10.4% and 10.5%, respectively.Conclusion:Patients under 40 years of age with endometrium thickness ≥8 mm, sperm
motility >55%, and on rFSH had significantly higher pregnancy rates
(p<0.05).