title: Vitamin D improves endometrial thickness in PCOS women who need intrauterine insemination: a randomized double-blind placebo-controlled trial.
abstract: OBJECTIVE
  To determine whether administration of vitamin D affects the success rates of intra uterine insemination (IUI) in infertile polycystic ovarian syndrome (PCOS) women and their endometrial thickness.
  
  
  METHODS
  This randomized, double-blind, placebo-controlled trial was conducted in an infertility clinic of Women's Hospital, and 110 infertile PCOS patients undergoing IUI were randomly divided to receive vitamin D or placebo. Endometrial thickness, IUI results, number of dominant follicles, duration of IUI cycle, and dose of HMG used in IUI were determined.
  
  
  RESULTS
  The endometrial thickness was significantly different in the group treated with vitamin D versus the placebo group (p = 0.003). There was no statistical difference in pregnancy out come between the two groups (RR = 1.167, CI 95 % 0.70-1.93). No statistical difference was found in number of dominant follicles (p = 0.96), duration of IUI cycles (p = 0.70) and dose of HMG used for IUI (p = 0.95).
  
  
  CONCLUSIONS
  It seems that administration of vitamin D induces endometrial proliferation in PCOS women during IUI cycle. The study was recorded in Iranian Registry of Clinical Trials(IRCT201104216246N1).
authors.affiliation: Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Mojgan
authors.initials: M
authors.lastname: Asadi
authors.forename: Nasim
authors.initials: N
authors.lastname: Matin
authors.forename: Mitra
authors.initials: M
authors.lastname: Frootan
authors.forename: Jaleh
authors.initials: J
authors.lastname: Mohamadpour
authors.forename: Mostafa
authors.initials: M
authors.lastname: Qorbani
authors.forename: Fatemeh Davari
authors.initials: FD
authors.lastname: Tanha
mesh_terms: D000328:Adult; D004311:Double-Blind Method; D004717:Endometrium / Q000000981:diagnostic imaging / Q000187:drug effects*; D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000209:etiology / Q000628:therapy; D007315:Insemination, Artificial; D006080:Ovarian Follicle / Q000000981:diagnostic imaging; D011085:Polycystic Ovary Syndrome / Q000150:complications*; D011247:Pregnancy; D018873:Pregnancy Rate; D014463:Ultrasonography; D014807:Vitamin D / Q000627:therapeutic use*; D014815:Vitamins / Q000627:therapeutic use*
chemical_list: D014815:Vitamins; D014807:Vitamin D