title: Lateralization of ovarian follicles.
abstract: OBJECTIVE
  To evaluate a possible lateralization of antral follicle count (AFC) based on the finding that endometriosis, if present, is more commonly found in the left hemipelvis.
  
  
  METHODS
  We evaluated the records of 6,617 baseline ultrasounds conducted at our Reproductive Center between 2007 and 2011 in a university teaching hospital setting. We included all ultrasounds with an AFC of 1 or greater and excluded those with incomplete documentation or with ovarian cyst, including endometriotic cysts (n = 909). The main outcome measure was the comparison of the number of antral follicles between the right and left ovary.
  
  
  RESULTS
  The number of antral follicles in the right ovary (median 18, range 15-22) was significantly higher than in the left ovary (median 16, range 13-20) among women with polycystic ovaries (PCO, AFC ≥24). Similarly, the number of antral follicles in the right ovary (median 8, range 6-10) was significantly higher than in the left ovary (median 7, range 5-9) in women with no PCO but normal ovarian reserve (AFC 10-23).
  
  
  CONCLUSIONS
  In women with PCO and non-PCO with normal ovarian reserve, the right ovary contains a higher number of antral follicles than the left ovary.
authors: Department of Obstetrics and Gynecology, McGill University, Montreal, Que., Canada.
authors: Abdulrahman
authors: A
authors: AlSerri
authors: Anita
authors: A
authors: Kuriya
authors: Hananel
authors: H
authors: Holzer
authors: Togas
authors: T
authors: Tulandi
mesh_terms: D000328:Adult; D004715:Endometriosis / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D006080:Ovarian Follicle / Q000000981:diagnostic imaging*; D011085:Polycystic Ovary Syndrome / Q000000981:diagnostic imaging*; D014463:Ultrasonography