"We will be planning to sue," she said, adding that pro-life groups are passing abortion restrictions in hopes of national changes through a U.S. Supreme Court decision.
According to Derzis, she and her allies are in "a very fragile place right now."
"Roe is clearly in danger and that's what they're preparing for … They hope by the time they get to the Supreme Court they will have changed the Supreme Court," she said.
It is unclear whether such abortion limits will pass scrutiny in federal court.
In their Feb. 8 message, Mississippi's Catholic bishops lamented the failure of the U.S. Senate to pass the Pain-Capable Unborn Child Protection Act, which would bar abortion 20 weeks after fertilization.
"We Catholic Bishops of Mississippi wish to reaffirm the sacredness of human life from conception until natural death. With Pope St. John Paul II, we recognize abortion as 'a most serious wound inflicted on society and its culture by the very people who ought to be society's promoters and defenders'," the bishops said, citing St. John Paul II's 1995 encyclical Evangelium vitae.
Legislators "have a duty to make courageous choices in support of life, especially through legislative measures," they said.
"We ask continued prayer for a culture of life to prevail in our society, and we urge those who voted against this legislation – especially those who are Catholic – to reconsider."