title: Body composition: A predictive factor of cycle fecundity.
abstract: OBJECTIVE
  To study the effect of body composition on reproduction in women with unexplained infertility treated with a controlled ovarian hyperstimulation and intrauterine insemination programme.
  
  
  METHODS
  This prospective observational study was conducted on 308 unexplained infertile women who were scheduled for a controlled ovarian hyperstimulation and intrauterine insemination programme and were grouped as pregnant and non-pregnant. Anthropometric measurements were performed using TANITA-420MA before the treatment cycle. Body composition was determined using a bioelectrical impedance analysis system.
  
  
  RESULTS
  Body fat mass was significantly lower in pregnant women than in non-pregnant women (15.61±3.65 vs.18.78±5.97, respectively) (p=0.01). In a multiple regression analysis, body fat mass proved to have a stronger association with fecundity than the percentage of body fat, body mass index, or the waist/hip ratio (standardized regression coefficient≥0.277, t-value≥2.537; p<0.05). The cut-off value of fat mass, which was evaluated using the receiver operating characteristics curve, was 16.65 with a sensitivity of 61.8% and a specificity of 70.2%. Below this cut-off value, the odds of the pregnancy occurrence was found to be 2.5 times more likely.
  
  
  CONCLUSIONS
  Body fat mass can be predictive for pregnancy in patients with unexplained infertility scheduled for a controlled ovarian hyperstimulation and intrauterine insemination programme.
authors.affiliation: Department of Obstetrics and Gynecology, Zeynep Kamil Women and Children Diseases Training and Research Hospital, Istanbul, Turkey.
authors.forename: Semra
authors.initials: S
authors.lastname: Kayatas
authors.affiliation: Department of Obstetrics and Gynecology, Zeynep Kamil Women and Children Diseases Training and Research Hospital, Istanbul, Turkey.
authors.forename: Aysen
authors.initials: A
authors.lastname: Boza
authors.affiliation: Department of Obstetrics and Gynecology, Zeynep Kamil Women and Children Diseases Training and Research Hospital, Istanbul, Turkey.
authors.forename: Murat
authors.initials: M
authors.lastname: Api
authors.affiliation: Department of Obstetrics and Gynecology, Zeynep Kamil Women and Children Diseases Training and Research Hospital, Istanbul, Turkey.
authors.forename: Didar
authors.initials: D
authors.lastname: Kurt
authors.affiliation: Department of Obstetrics and Gynecology, Zeynep Kamil Women and Children Diseases Training and Research Hospital, Istanbul, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Eroglu
authors.affiliation: Department of Obstetrics and Gynecology, Zeynep Kamil Women and Children Diseases Training and Research Hospital, Istanbul, Turkey.
authors.forename: Sevcan Arzu
authors.initials: SA
authors.lastname: Arınkan
keywords: Bioelectrical impedance; Fat mass; Fecundity; Infertility; Unexplained