A miscarriage is the loss of a pregnancy before the 20th week. The most common cause of miscarriage is chromosomal abnormalities in the fetus, which usually occur spontaneously and are not related to any action taken by the mother. Other potential causes of miscarriage include maternal health conditions such as infections, hormonal imbalances, thyroid disorders, and autoimmune disorders, as well as lifestyle factors such as smoking, alcohol use, drug use, and advanced maternal age. Risk factors for miscarriage include a history of previous miscarriages, chronic health conditions, and certain lifestyle factors.

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