Roe v. Wade made abortion a constitutional right in 1972, but it's been a hot point of contention since then. Many believed that the extreme stance the Mitt Romney and members of the Republican Party took against abortion even in the cases of rape or incest back in 2012 led to their downfall as it was widely unpopular among the general electorate.
Republicans running for the 2016 presidential seat like Donald Trump, Ben Carson and Jeb Bush have all said that they would defund Planned Parenthood and try to repeal Roe v. Wade and Obamacare, which provides STI testing, cancer screenings and contraception services to many women. However, almost all say that abortion is acceptable in the case of rape, incest, or if the mother's health would be compromised. Democratic front-runners Bernie Sanders and Hillary Clinton Bernie Sanders have both said that abortion is a personal decision for a woman and her family to make, not the government.
Other aspects of women's reproductive care are also under fire depending on if Obamacare is repealed. For example, Obamacare currently offers coverage for maternity care, something that is not covered by a lot of insurance companies. Also as recently as 2014, the Supreme Court ruled that corporations could claim religious exemptions against providing contraceptives to its employees in violation of the Affordable Care Act. Hillary Clinton called the Hobby Lobby decision a "slippery slope," saying "It is a disturbing trend that you see in a lot of societies that are unstable and prone to extremism. Women's bodies are used as the defining and unifying issue to bring together people--men--to get them to behave in ways that are disadvantageous to women but prop up rulers."