The aim of the study to evaluate the possible effect of washing the insemination catheters before intrauterine insemination on the pregnancy outcomes.

We know that washing the catheters are already washed in the case of embryo transfer for assisted reproductive techniques. Based on this knowledge, we also constituted the hypothesis which is about the impact of washing the catheter on the gametes and embryos. The pre-washing the catheter before intrauterine insemination may provide higher pregnancy results.

Inclusion Criteria:

• at least 1-year infertility
• at least one patent fallopian tube confirmed by hysterosalpingography (HSG) or laparoscopy
• ovulatory menstrual cycles
• suitable semen analysis according to the World Health Organization (WHO) criteria for intrauterine insemination

Exclusion Criteria:

• bilateral tubal occlusion
• mild or severe endometriosis
• day 3 serum FSH (follicle-stimulating hormone) > 13 IU/L
• abnormal thyroid function tests, hyperprolactinemia
• total motile sperm count (TMSC) < 5 millions or severe teratospermia (<4% normal forms) following semen preparation
• more than 3 follicles above the size of 17mm on the day of ovulation triggering