The two regulations, which would have let employers with "religious and moral objections" deny employees cost-free birth control coverage, briefly took effect Monday.
Irish 4 Reproductive Health, a student activist group, filed suit against the Trump administration and Notre Dame over the school's refusal to offer birth control coverage to students and faculty.
Before a 2012 contraceptive mandate, 30 to 44 percent of women's medical spending used to go toward birth control. After the mandate, those numbers fell to 13 to 22 percent.