Who shall we blame for teen pregnancy?

I have no idea. Here's the story from Time:

School officials started looking into the matter as early as October after an unusual number of girls began filing into the school clinic to find out if they were pregnant. By May, several students had returned multiple times to get pregnancy tests, and on hearing the results, "some girls seemed more upset when they weren't pregnant than when they were," Sullivan says. All it took was a few simple questions before nearly half the expecting students, none older than 16, confessed to making a pact to get pregnant and raise their babies together. Then the story got worse. "We found out one of the fathers is a 24-year-old homeless guy," the principal says, shaking his head.
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Gloucester's elected school committee plans to vote later this summer on whether to provide contraceptives. But that won't do much to solve the issue of teens wanting to get pregnant. Says rising junior Kacia Lowe, who is a classmate of the pactmakers': "No one's offered them a better option." And better options may be a tall order in a city so uncertain of its future.