Pregnancy-related fibroid reduction.

@article{Laughlin2010PregnancyrelatedFR,
  title={Pregnancy-related fibroid reduction.},
  author={Shannon K. Laughlin and Amy H. Herring and David A. Savitz and Andrew F. Olshan and Julia Fielding and Katherine Hartmann and Donna D. Baird},
  journal={Fertility and sterility},
  year={2010},
  volume={94 6},
  pages={2421-3}
}
We tested the hypothesis that the protective effect of parity on fibroids is due to direct pregnancy-related effects by following women from early pregnancy to postpartum period with ultrasound. Of 171 women with one initial fibroid, 36% had no identifiable fibroid at the time of postpartum ultrasound, and 79% of the remaining fibroids decreased in size.