Question

Infertility

When are miscarriages most likely to happen?

A Answers (2)

  • AMichael Roizen, MD, Internal Medicine, answered
    About 80 percent of miscarriages (also called spontaneous abortions) occur during the first 12 weeks of pregnancy, and half of those are caused by chromosomal abnormalities that are incompatible with a live birth. The risk of miscarriage increases with the number of previous births as well as both maternal and paternal age: A quarter of miscarriages happen in women older than 40.
  • AKevin Windom, MD, Obstetrics & Gynecology, answered

    90% of miscarriages happen in the first trimester. 

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