Exercise helps lower stroke risk, but birth control pills and pregnancy can be problematic for younger women. iStockphoto hide caption

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Insurers still charge copays for some contraceptives. Laura Garca/iStockphoto hide caption

itoggle caption Laura Garca/iStockphoto

Estrogen affects cells in the eye's retina, which may help explain a possible link between glaucoma and estrogen levels. iStockphoto.com hide caption

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The Plan B One-Step morning-after pill will now be available to women as young as 15 without a prescription, and will have another three years of protection from generic competition. AP hide caption

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Baltimore Archbishop William Lori gave voice to a letter Catholic groups sent to the administration and Congress to protest insurance rules for contraceptives. Patrick Semansky/AP hide caption

itoggle caption Patrick Semansky/AP

The Hobby Lobby chain of arts and crafts stores has gone to court to block a provision of the administration's health law that requires employers' health plans to pay for contraceptives. Tony Gutierrez/AP hide caption

itoggle caption Tony Gutierrez/AP

In a compromise, President Obama proposed to allow religious universities and charities offer birth control coverage through their own health insurers. iStockphoto.com hide caption

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A bus in Washington, D.C., displays an advertisement for a female condom in July 2010. To encourage their use, community groups distributed more than 500,000 of the female condoms, flexible pouches that are wider than a male condom but similar in length, during instruction sessions at beauty salons, barber shops, churches and restaurants. Drew Angerer/AP hide caption

itoggle caption Drew Angerer/AP