Reynolds signed the bill just hours after a rally at the state capitol in support of women's reproductive rights.
The measure is expected to quickly face a court challenge as both the Iowa affiliates of Planned Parenthood and the American Civil Liberties Union said earlier Friday that they would sue Reynolds if she signed the bill.
The State House passed the legislation on Tuesday night with a 51-46 vote, Iowa Public Radio reported. "Banning abortion before most women even know they're pregnant, this law will undoubtedly be challenged by the courts like other unconstitutional abortion bans before it", NARAL Pro-Choice America President Ilyse Hogue said in a statement provided to Refinery29.
This week, two conservative states moved forward with what could become the most severe abortion bans in the country.
Nonetheless, the measure wouldn't ban abortion after six weeks in all circumstances - some exemptions embrace cases of rape, incest, fetal abnormalities or to avoid wasting the mom's life.
"Politicians in Iowa are hell bent on controlling women's bodies, taking away our rights, and blocking access to health care". Acknowledging this, Reynolds said that her actions on Friday were "bigger than just a law", and that she will not be backing down.
Reynolds said at the bill signing that stopping a beating heart is immoral and to sell fetal body parts, which also is outlawed in the legislation, is "sickening".
Manchester United's fierce rivalry with Arsenal transformed the Premier League, says Ferguson
The Belgium striker was involved in a challenge with Konstantinos Mavropanos and injured his foot during their 2-1 win on Sunday. And Mata was concerned about the 24-year-old being forced off, especially because of the impact he has had this season.
Planned Parenthood went so far as to call the legislation "gross" and "dangerous," adding, "See you in court". Those opposing the abortion law backed by Governor Kim Reynolds hope for a similar outcome.
These legal challenges could work their way up to the Supreme Court, setting up a showdown over Roe v. Wade, the landmark case that affirmed a woman's legal right to abortion until fetal viability.
Erin Davison-Rippey of Planned Parenthood of the Heartland promised the organization would do "whatever it takes to make sure that we protect the rights that our mothers, our grandmothers and our great-grandmothers have already won".
Abortion rates have declined nationwide in the last years, but research has found the procedure is still fairly common: About one in four women will have an abortion by the age of 45.
"We couldn't be more pleased", said Iowans for Life head Maggie DeWitte.
Kim Reynolds speaks during a news conference as acting Lt. Gov. Adam Gregg, left, looks on during the opening day of the Iowa Legislature at the Statehouse in Des Moines, Iowa.