Dehghani 2014.

Methods	Single centre, parallel designed randomised trial with computer generated list. Concealment of allocation: third party Single blinding used (investigator). Follow up until 12 weeks pregnancy
Participants	100 infertile couples were divided into two groups Inclusion criteria: 18 to 35 years; open fallopian tubes confirmed by hysterosalpingography Exclusion criteria: tubal factor, severe endometriosis, hypothalamic amenorrhea, or severe oligospermia (sperm count lower than 5 million per ml based on WHO 2012 classification) (Table 1) in their husbands
Interventions	HCG injection before IUI and HCG injection after IUI
Outcomes	The main outcome measure was the result of an hCG test that was done two weeks after the IUI; if it was positive, transvaginal sonography would be performed in the seventh week for clinical confirmation of pregnancy
Notes