Final answer:
Miscarriage, also known as spontaneous abortion, is the loss of pregnancy before the 20th week due to various risk factors.
Explanation:
Miscarriage, also known as spontaneous abortion, refers to the loss of pregnancy before the 20th week. It is the most common form of pregnancy loss. Risk factors include older maternal age, a history of miscarriages, disorders of the uterus or cervix, and chronic diseases such as polycystic ovary syndrome.
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