The partnership between Planned Parenthood and the school is believed to be the only one of its kind in the nation.
The services are free and confidential, and aimed at reducing unplanned pregnancies and the spread of sexually transmitted diseases.
"I know the birth control, obviously, it teaches girls a lot, it prevents pregnancies," said Anne Hennessy, executive director, Right to Life League of Southern California. "We would hope that the care in that part of their lives would be done in collaboration with their parents rather than through the schools."
Teenage pregnancy rates in Los Angeles County have dropped in recent years. However the numbers are still disproportionately high in some areas, including the neighborhood served by Roosevelt.