title: Timed intercourse after intrauterine insemination for treatment of infertility.
abstract: OBJECTIVE
  To compare the pregnancy rates, between intrauterine insemination (IUI) followed by timed intercourse and IUI only for treatment of the infertile couples.
  
  
  METHODS
  A prospective study of two different protocols of intrauterine insemination in two hundred and one infertile couples with a normal spermiogram was carried out. Of these, 101 couples were treated with IUI alone and 100 couples had both IUI and timed intercourse within a 12-18 h period. The pregnancy rates were compared between groups.
  
  
  RESULTS
  The characteristics of the two groups were similar in terms of the mean age, as well as the duration and causes of infertility. The cycle characteristics following follicular stimulation were also similar between two groups. The pregnancy rate per cycle increased with increasing numbers of total motile sperm per insemination in the IUI alone group (P=0.045). Timed intercourse increased pregnancy rate in patients with lower motile sperm number (<40x10(6)) (27.7% versus 10.5%, P=0.023), but not in patients with higher sperm number (> or =40x10(6)) (25.7% versus 22.7%, P=0.671).
  
  
  CONCLUSIONS
  In IUI with low number of motile sperm inseminated, timed intercourse significantly increases the pregnancy rates over IUI alone in infertile couples with a normal sperminogram. This alternative treatment appears to be a practical, simple, and inexpensive addition that improves the pregnancy rate in patients receiving ovulation induction and intrauterine insemination program.
authors.affiliation: Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, Kaohsiung, Taiwan.
authors.forename: F J
authors.initials: FJ
authors.lastname: Huang
authors.forename: S Y
authors.initials: SY
authors.lastname: Chang
authors.forename: J C
authors.initials: JC
authors.lastname: Chang
authors.forename: F T
authors.initials: FT
authors.lastname: Kung
authors.forename: J F
authors.initials: JF
authors.lastname: Wu
authors.forename: M Y
authors.initials: MY
authors.lastname: Tsai
mesh_terms: D000328:Adult; D002996:Clomiphene / Q000627:therapeutic use; D003075:Coitus; D005260:Female; D005640:Follicle Stimulating Hormone / Q000627:therapeutic use; D006801:Humans; D007246:Infertility / Q000628:therapy*; D007317:Insemination, Artificial, Homologous; D008297:Male; D008596:Menotropins / Q000627:therapeutic use; D011247:Pregnancy; D013081:Sperm Motility; D013997:Time Factors
chemical_list: D002996:Clomiphene; D008596:Menotropins; D005640:Follicle Stimulating Hormone