1, Some people think abortion is women’s "fundamental right", and that recognized by the US Supreme Court.
2, Personhood begins at birth, not at conception. Abortion is the termination of a pregnancy, not a baby. Personhood at conception is not a proven biological fact.
3, A baby before birth can not feeling pain when abortion is performed.
According to Stuart W. G. Derbyshire, PhD, Senior Lecturer at the University of Birmingham (England), "[n]ot only has the biological development not yet occurred to support pain experience, but the environment after birth, so necessary to the development of pain experience, is also yet to occur."
4, Access to legal, professionally-performed abortions reduces injury and death caused by unsafe, illegal abortions. According to The World Health Organization estimated in 2006 that "back-alley" abortions cause 68,000 maternal deaths each year in countries where abortion is not legal.
5, The anti-abortion position is usually based on religious beliefs and threatens the vital separation of church and state. Religious ideology should not be a foundation for law in the United States.
6, Many women who choose abortion don't have the financial resources to support a child. A Sep. 2005 survey in the peer-reviewed journal Perspectives on Sexual and Reproductive Health asking women why they had an abortion found that 73% of respondents said they could not afford to have a baby, and 38% said giving birth would interfere with their education and career goals. Reproductive choice protects women from financial disadvantage.
7, Abortion is an effective tool for population control.
8, Abortion reduces crime.