News

  1. Health & Medicine

    Pregnancy spurs a tumor suppressor

    Pregnancy hormones may prime breast cells to maintain a supply of p53, a cancer suppressor protein, thus accounting for why women who have undergone pregnancy generally have a lower breast cancer risk than do others.

    By Nathan Seppa
  2. Health & Medicine

    Hormone wards off immune cells in womb

    A hormone known for its involvement in the brain's response to stress also plays a key role in shielding the developing embryo from its mother's immune system.

    By Ben Harder
  3. Health & Medicine

    AMA: Drugs are for anthrax, not fear

    Doctors should not use antibiotics prophylactically against anthrax unless there is good reason to believe the individual had encountered the germs directly, the American Medical Association advises.