ACOG Committee Opinion No. 434: induced abortion and breast cancer risk.
The Relationship between induced abortion and the subsequent development of breast cancer has been the subject of a substantial amount of epidemiologic study. Early studies of the relationship between prior induced abortion and breast cancer risk were methodologically flawed. More rigorous recent studies demonstrate no causal relationship between induced abortion and a subsequent increase in breast cancer risk.
D000028:Abortion, Induced / Q000009:adverse effects*; D001943:Breast Neoplasms / Q000209:etiology*; D005260:Female; D006801:Humans; D011247:Pregnancy