Young women with polycystic ovary syndrome who have many follicles are at highest risk of ovarian hyperstimulation syndrome. Factors that increase your risk of OHSS include:

  • Polycystic ovary syndrome — a common reproductive disorder that causes irregular menstrual periods, excess hair growth and unusual appearance of the ovaries on ultrasound examination
  • Large number of follicles
  • Young age
  • Low body weight
  • High or steeply increasing level of estradiol (estrogen) before an HCG trigger shot
  • Previous episodes of OHSS
  • Migraine headaches
  • A multiple pregnancy

In some cases, OHSS affects women who have no risk factors at all.

Feb. 14, 2014