; and (2) by adding at the end the following: (gg) Increased FMAP for additional expenditures for low-Income pregnant women For calendar quarters beginning on or after January 1, 2020, notwithstanding subsection (b), the Federal medical assistance percentage for a State, with respect to the additional amounts expended by such State for medical assistance under the State plan under this title or a waiver of such plan that are attributable to requirements imposed by the amendments made by the Healthy MOMMIES Act (as determined by the Secretary), shall be equal to 100 percent. . (f) GAO study and report (1) In general Not later than 1 year after the date of the enactment of this Act, the Comptroller General of the United States shall submit to Congress a report on the gaps in coverage for— (A) pregnant women under the Medicaid program under title XIX of the Social Security Act ( 42 U.S.C. 1396 et seq.) and the Children's Health Insurance Program under title XXI of the Social Security Act ( 42 U.S.C. 1397aa et seq.)