title: A population-based study on infertility and its influencing factors in four selected provinces in Iran (2008-2010).
abstract: BACKGROUND
  Infertility has a varied impact on multiple dimensions of health and functioning of women.
  
  
  OBJECTIVE
  We aimed to identify the burden of infertility and its influencing factors based on a population based study conducted in four provinces of Iran.
  
  
  METHODS
  A sample of 1126 women, aged 18-45 years, was selected using the multi stage, stratified probability sampling procedure; those met the eligibility criteria were invited for further comprehensive interview. This study used the definition of infertility proposed by World Health Organization "the woman has never conceived despite cohabitation and exposure to pregnancy for a period of 1 year". Results : The overall prevalence of lifetime infertility and current primary infertility were 21.1% (95% CI: 18.4- 23.8) and 6.4% (95% CI: 4.8-8) respectively. The probability of first pregnancy at the end of 2 years of marriage was 94% for all ever-married women. Infertility were observed as significantly higher among women age 31-35 (OR: 4.6; 95% CI: 1.9-11.5; p=0.001) and women with more than 9 years of education (OR: 2.8; 95% CI: 1.5-3.3; p<0.0001).
  
  
  CONCLUSIONS
  The necessities of modern living have compelled many women to postpone childbearing to their late reproductive years; however they must be informed of being at risk of infertility with ageing.
authors.affiliation: Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Marzieh
authors.initials: M
authors.lastname: Rostami Dovom
authors.affiliation: Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Fahimeh
authors.initials: F
authors.lastname: Ramezani Tehrani
authors.affiliation: Department of Family Health, Ministry of Health and Medical Education, Tehran, Iran.
authors.forename: Mehrandokht
authors.initials: M
authors.lastname: Abedini
authors.affiliation: Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Golshan
authors.initials: G
authors.lastname: Amirshekari
authors.affiliation: Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Somayeh
authors.initials: S
authors.lastname: Hashemi
authors.affiliation: Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Mahsa
authors.initials: M
authors.lastname: Noroozzadeh
keywords: Female; Infertility; Populationbasedstudy; Prevalence; Sterility