title: A prospective study on the association between red hair color and endometriosis in infertile patients.
abstract: OBJECTIVE
  To determine if red-haired infertile women have an increased prevalence of endometriosis.
  
  
  METHODS
  Prospective, nonblinded.
  
  
  METHODS
  Large, metropolitan, private hospital, associated with a university. Subspeciality care provided by reproductive endocrinologists.
  
  
  METHODS
  One hundred forty-three consecutive women undergoing laparoscopy or laparotomy for infertility.
  
  
  METHODS
  Laser ablation of any endometriosis present.
  
  
  METHODS
  Presence of endometriosis.
  
  
  RESULTS
  Of 143 women entered into the study, 12 had natural red hair. The ages of these women ranged between 23 and 41 years. Ten of 12 (83%) of the red-haired women were found to have endometriosis compared with 55 of 131 (42%) of nonredheads. By statistical analysis, the 95% confidence intervals for the presence of endometriosis in redheads was 55% to 100% versus 34% to 51% for nonredheads.
  
  
  CONCLUSIONS
  The results suggest an association between the occurrence of natural red hair and those factors that lead to the development of endometriosis.
authors.affiliation: Department of Obstetrics and Gynecology, University of Louisville School of Medicine, Kentucky, USA.
authors.forename: S H
authors.initials: SH
authors.lastname: Woodworth
authors.forename: M
authors.initials: M
authors.lastname: Singh
authors.forename: M A
authors.initials: MA
authors.lastname: Yussman
authors.forename: J S
authors.initials: JS
authors.lastname: Sanfilippo
authors.forename: C L
authors.initials: CL
authors.lastname: Cook
authors.forename: S R
authors.initials: SR
authors.lastname: Lincoln
mesh_terms: D000328:Adult; D004715:Endometriosis / Q000150:complications / Q000453:epidemiology* / Q000601:surgery; D005260:Female; D006200:Hair Color; D006801:Humans; D007247:Infertility, Female / Q000150:complications*; D053685:Laser Therapy; D011446:Prospective Studies