FILE - In this undated image provided by Merck, a model holds the Nexplanon hormonal implant for birth control. Providing women with free birth control prevents abortions and teen births, concludes a massive study released on Thursday, Oct. 4, 2012, with the strongest evidence to date that a bitterly contested Obama administration policy will benefit women's health. (AP Photo/Merck)

Associated Press
FILE - In this undated image provided by Merck, a model holds the Nexplanon hormonal implant for birth control. Providing women with free birth control prevents abortions and teen births, concludes a massive study released on Thursday, Oct. 4, 2012, with the strongest evidence to date that a bitterly contested Obama administration policy will benefit women's health. (AP Photo/Merck)
FILE - In this undated image provided by Merck, a model holds the Nexplanon hormonal implant for birth control. Providing women with free birth control prevents abortions and teen births, concludes a massive study released on Thursday, Oct. 4, 2012, with the strongest evidence to date that a bitterly contested Obama administration policy will benefit women's health. (AP Photo/Merck)
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