This year, the program was expanded from five to 13 schools, and Caraway said they intend to continue expanding to eventually cover all of the city's public schools.

Plan B, also known as the "morning after" pill, works in a similar way to birth control pills, except it is taken after sex to prevent an unplanned pregnancy, according to its manufacturer Teva Pharmaceuticals. The pill should be taken as soon as possible within 72 hours of unprotected sex or birth control failure.

Plan B should not "affect or terminate" an existing pregnancy, according to the company's advertising.

New York City's pilot program, Connecting Adolescents To Comprehensive Health or CATCH, is aimed at stemming the teen pregnancy rate, which causes many girls to leave school.

The CATCH program targets selected schools in poorer districts without health centers.

Parents are sent a letter informing them of the availability of contraception. If they do not check a box telling the school not to distribute contraceptives to their child, the student may access the drugs without permission.

"We wait about a month to give parents a chance to read the letter and opt out," said Caraway. "After that, any student at one of these schools can get emergency contraception or a pregnancy test if they feel they may be pregnant or have had unprotected sex."

Students have long had access to condoms in the city schools.

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