title: Is Coasting Valuable in All Patients with Any Cause of Infertility?
abstract: OBJECTIVE
  This study aimed to assess the influence of coasting duration on the number and quality of oocytes and fertilization rate in male factor infertile women and those with polycystic ovary syndrome (PCOS).
  
  
  METHODS
  In this prospective observational follow-up study, 114 patients undergoing coasting (53 women with male factor infertility and 61 women with PCOS) were evaluated at the Royan Institute Research Center, Iran, between 2010 and 2012.
  
  
  RESULTS
  The results were analyzed according to the coasting periods of 1-4 days. In normal females, the number of oocytes retrieved was significantly reduced after the second day (p= 0.004). In addition, a statistically significant drop was observed in the number of metaphase II oocytes and fertilization rate after the third day (p= 0.006 andp= 0.006, respectively). No significant differences were observed in the number and quality of oocytes retrieved and fertilization rate with regard to coasting days in PCOS patients.
  
  
  CONCLUSIONS
  Coasting with duration of more than three days should be performed with caution in normal females who are at risk of developing ovarian hyperstimulation syndrome.
authors.affiliation: Department of Endocrinology and Female Infertility, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran.
authors.forename: Tahereh
authors.initials: T
authors.lastname: Madani
authors.affiliation: Department of Endocrinology and Female Infertility, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran.
authors.forename: Nadia
authors.initials: N
authors.lastname: Jahangiri
authors.affiliation: Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran.
authors.forename: Poopak
authors.initials: P
authors.lastname: Eftekhari-Yazdi
authors.affiliation: Department of Endocrinology and Female Infertility, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran; Department of Obstetrics and Gynecology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Mahnaz
authors.initials: M
authors.lastname: Ashrafi
authors.affiliation: Department of Statistics, Mathematical Sciences and Computer Faculty, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
authors.forename: Mohammadreza
authors.initials: M
authors.lastname: Akhoond
keywords: Assisted Reproductive Techniques; Infertility, Male; Ovarian Hyperstimulation Syndrome; Polycystic Ovary Syndrome