Women's rights campaigners see the creeping criminalisation of pregnant women as a new front in the culture wars over abortion, in which conservative prosecutors are chipping away at hard-won freedoms by stretching protection laws to include foetuses, in some cases from the day of conception. In Gibbs' case defence lawyers have argued before Mississippi's highest court that her prosecution makes no sense. Under Mississippi law it is a crime for any person except the mother to try to cause an abortion.

"If it's not a crime for a mother to intentionally end her pregnancy, how can it be a crime for her to do it unintentionally, whether by taking drugs or smoking or whatever it is," Robert McDuff, a civil rights lawyer asked the state supreme court.