title: Comparison of pregnancy rates in PCOS patients undergoing clomiphene citrate and IUI treatment with different leading follicular sizes.
abstract: OBJECTIVE
  The objective of the study was to compare the pregnancy rates in PCOS patients undergoing clomiphene citrate (CC) and intrauterine insemination (IUI) treatment with different leading follicular sizes.
  
  
  METHODS
  A total of 358 infertile women with PCOS who underwent 563 clomiphene citrate and IUI treatment cycles were included in this prospective study. Treatment cycles were divided into three groups according to leading follicular size on the day of hCG administration: Group I: follicular size 17-18 mm (n = 177), Group II: 19-22 mm (n = 321), and Group III : >22 mm (n = 65). Pregnancy rates were evaluated. Treatment outcomes of the groups were further analyzed related to endometrial thickness measurement on the day of hCG. For this purpose, cycles were placed into three subgroups as follows: endometrial thickness <7, 8-9, and >9 mm.
  
  
  RESULTS
  There was no statistically significant difference in clinical pregnancy rate per cycle between the groups (8.5, 10, and 9.2 % for Group I, II, and III, respectively, p = 0.86). In further analyses related to endometrial thickness, no significant difference was also found in pregnancy rate among the groups.
  
  
  CONCLUSIONS
  This results suggest that pregnancy rate is not related to leading follicle size on the day of hCG administration in PCOS patients treated with CC and IUI. In addition, pregnancy rate in women with different follicular sizes is not influenced by the endometrial thickness.
authors.affiliation: Department of Reproductive Endocrinology, Zekai Tahir Burak Women's Health Research and Education Hospital, Ankara, Turkey. bernaseckin1@hotmail.com.
authors.forename: Berna
authors.initials: B
authors.lastname: Seckin
authors.affiliation: Department of Reproductive Endocrinology, Zekai Tahir Burak Women's Health Research and Education Hospital, Ankara, Turkey.
authors.forename: Meryem Kuru
authors.initials: MK
authors.lastname: Pekcan
authors.affiliation: Department of Reproductive Endocrinology, Zekai Tahir Burak Women's Health Research and Education Hospital, Ankara, Turkey.
authors.forename: Esra Isci
authors.initials: EI
authors.lastname: Bostancı
authors.affiliation: Department of Gynecology and Obstetrics, Konya Research and Training Hospital, Konya, Turkey.
authors.forename: Hasan Ali
authors.initials: HA
authors.lastname: Inal
authors.affiliation: Department of Reproductive Endocrinology, Zekai Tahir Burak Women's Health Research and Education Hospital, Ankara, Turkey.
authors.forename: Mahmut Nedim
authors.initials: MN
authors.lastname: Cicek
mesh_terms: D000328:Adult; D002996:Clomiphene / Q000008:administration & dosage / Q000627:therapeutic use*; D005260:Female; D005300:Fertility Agents, Female / Q000008:administration & dosage / Q000627:therapeutic use*; D005307:Fertilization in Vitro; D006801:Humans; D007247:Infertility, Female / Q000628:therapy*; D007315:Insemination, Artificial / Q000379:methods*; D006080:Ovarian Follicle / Q000000981:diagnostic imaging / Q000187:drug effects*; D010060:Ovulation / Q000187:drug effects*; D010062:Ovulation Induction / Q000379:methods; D011085:Polycystic Ovary Syndrome / Q000150:complications*; D011247:Pregnancy; D018873:Pregnancy Rate; D011446:Prospective Studies; D016896:Treatment Outcome; D014463:Ultrasonography
chemical_list: D005300:Fertility Agents, Female; D002996:Clomiphene
keywords: Clomiphene citrate; Endometrial thickness; Follicular size; Intrauterine insemination; PCOS; Pregnancy rate