TOPEKA, Kan. (AP) — Buoyed by spring victories in the Kansas Capital, anti-abortion groups are planning to push for more restrictive measures, including one that would ban abortions when a fetal heartbeat is detected.

A petition that is circulating calls for Gov. Sam Brownback, an anti-abortion Republican, to convene a special session to consider the so-called “heartbeat bill.”

The Wichita Eagle reported that another group plans to introduce a bill calling for a state constitutional amendment guaranteeing the rights of personhood at the moment of fertilization.

The measures could spark a challenge to Roe v. Wade.

The 1973 U.S. Supreme Court ruling upheld a woman’s right to an abortion until fetal viability. A fetus is usually considered viable at 22 to 24 weeks. Fetal heartbeats can be detected as early as six weeks.

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Information from: The Wichita Eagle, https://www.kansas.com