Abortion is the medical term meaning sponaneous or induced
termination of pregnancy. What is commonly known as a miscarriage
is called a spontaneous abortion in medical terminology. An induced
abortion is commonly called an abortion in lay language.
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Spontaneous abortion.
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Spontaneous abortion is another word for miscarriage aka not
induced and the risk is bigger in the first trimester.
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The traditional designations are:
During the first trimester - abortion (spontaneous abortion, if
you want to avoid ambiguity)