Does abortion increase the risk of breast cancer?

  • Somerville S
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Abstract

According to this hypothesis, an early FFTP [first full-term pregnancy] would provide the greatest protection against breast cancer by drastically reducing, early on, the presence of undifferentiated and hence vulnerable breast cells, thereby decreasing the risk of subsequent transformation ... Other types of pregnancies, however, might increase the risk of breast cancer. If a woman's first pregnancy resulted in a first trimester abortion, the dramatic rise in undifferentiated cells that takes place during the first trimester would not be followed by the marked differentiation occurring during the second and third trimesters. The consequent sharp increase in the number of vulnerable cells would thus elevate breast cancer risk.

Author-supplied keywords

  • Abortion, Induced
  • Adult
  • Breast Neoplasms
  • Cocarcinogenesis
  • Contraceptives, Oral
  • Cross-Sectional Studies
  • Female
  • Humans
  • Incidence
  • Pregnancy
  • Risk Factors
  • United States
  • adverse effects
  • epidemiology
  • etiology

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Authors

  • S W Somerville

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