The Naval Academy first accepted women as midshipmen in 1976, after Congress authorized the admission of women to all of the service academies. Women account for about 22 percent of entering plebes. They pursue the same academic and professional training as do their male classmates, except that certain physical aptitude standards for women are lower than for men, mirroring the standards of the Navy itself. Women have most recently composed about 17 percent of each graduating class, however this number continues to rise. The first pregnant midshipman graduated in 2009. While regulations expressly forbade this, the woman was able to receive a waiver from the Department of the Navy.