According to the ACLU:
When Jessica Mann was pregnant with her third child, her OB-GYN strongly recommended that she undergo a tubal ligation because of a pre-existing brain tumor that could be life-threatening when strained by pregnancy. Her doctor also advised her to have the procedure performed at the time of her C-section delivery, when it is safest and most effective. But Genesys refused to allow Mann’s OB-GYN to perform the tubal ligation because Ascension and Genesys are governed by religious rules developed by the United States Conference of Catholic Bishops that classify common reproductive health services as “intrinsically evil.”
The ACLU argues that Ascension’s policy banning tubal ligations at the time of delivery discriminates against women on the basis of sex and violates the non-discrimination protections of Section 1557 of the Affordable Care Act. Ascension is the largest non-profit health system in the United States and its policies have a big impact on women who may not know that their health care provider is governed by religious rules or may not have an option of an alternative provider.