The Pregnancy in Polycystic Ovary Syndrome study: baseline characteristics of the randomized cohort including racial effects

Fertil Steril. 2006 Oct;86(4):914-33. doi: 10.1016/j.fertnstert.2006.03.037. Epub 2006 Sep 11.


Objective: To report the baseline characteristics and racial differences in the polycystic ovary syndrome (PCOS) phenotype from a large multicenter clinical trial (PPCOS).

Design: Double-blind, randomized trial of three treatment regimens (with extended release metformin or clomiphene citrate).

Setting: Academic medical centers.

Patient(s): Six hundred twenty-six infertile women with PCOS, aged 18-39 years, with elevated T levels and oligomenorrhea (exclusion of secondary causes), seeking pregnancy, with > or = 1 patent fallopian tube, normal uterine cavity, and a partner with sperm concentration > or = 20 x 10(6)/mL in > or = 1 ejaculate.

Intervention(s): Baseline characterization.

Main outcome measure(s): Historical, biometric, and biochemical measures of PCOS.

Result(s): There were no significant differences in baseline variables between treatment groups. The overall mean (+/-SD) age of the subjects was 28.1 +/- 4.0 years, and the mean body mass index was 35.2 kg/m2 (+/-8.7). Polycystic ovaries (PCOs) were present in 90.3% of the subjects, and the mean volume of each ovary was 10 cm3 or more. Of the subjects, 7% had ovaries that were discordant for PCO morphology. At baseline, 18.3% of the subjects had an abnormal fasting glucose level (> 100 mg/dL). Asians tended to have a milder phenotype, and whites and African Americans were similar in these measures.

Conclusion(s): The treatment groups were well matched for baseline parameters, and we have added further information to the PCOS phenotype.

Publication types

  • Multicenter Study
  • Randomized Controlled Trial
  • Research Support, N.I.H., Extramural

MeSH terms

  • Adolescent
  • Adult
  • Age Distribution
  • Clomiphene / administration & dosage*
  • Continental Population Groups / statistics & numerical data*
  • Double-Blind Method
  • Drug Combinations
  • Female
  • Fertility Agents, Female / administration & dosage
  • Humans
  • Hypoglycemic Agents / administration & dosage
  • Infertility, Female / drug therapy*
  • Infertility, Female / epidemiology*
  • Metformin / administration & dosage*
  • Polycystic Ovary Syndrome / drug therapy*
  • Polycystic Ovary Syndrome / epidemiology*
  • United States / epidemiology


  • Drug Combinations
  • Fertility Agents, Female
  • Hypoglycemic Agents
  • Clomiphene
  • Metformin