Some try to justify abortion by claiming that it is merely a fetus or an embryo that is inside the woman, not an actual baby, person, or human being.
The terms "embryo" and "fetus" refer to a human being in an early stage of development. "Fetus" is simply a Latin word that means "offspring," "young one," or "little child." Saying that a fetus is not a human being because the fetus is in an early stage of development is like saying a toddler is not a human being because the toddler is in an early stage of development, which is ridiculous.
Where a human being is in her stage of development has nothing to do with whether she deserves to live. Does an older born human being have more of a right to live than a younger born human being? Everyone would agree that the answer to this is no. So, why would a younger unborn human being have less of a right to live?
Some argue that an unborn human being is different in that an unborn human being:
Those who use this argument are usually trying to say that the "fetus" is actually not a human being. If this is the case, then see this article: Definitive proof that human life begins at conception and fertilization