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Not all emergency contraceptives are made equal, and women need to know the differences when they are choosing one in an already stressful situation.
There are three forms of fast-acting contraceptives: Plan B, Ella and a copper IUD.
Others - Women - Others - Pregnancy - Scare
Some of these are not as effective as others for some women as others, and they are not all proven to work equally long after a pregnancy scare or rape.
Speaking to Daily Mail Online, OBGYN Dr Holly Bullock broke down the differences between the three for Daily Mail Online.
Emergency - Contraceptive - US - Food - Drug
Emergency contraceptive has been available in the US since 1999 when the Food and Drug Administration approved levonorgestrel pills - known by the trade name Plan B - for the purpose.
But since then, another pill to prevent pregnancy has come onto the market, and scientists have discovered that a copper IUD can have the same effect.
Plan - B - Form - Emergency - Contraceptive
Plan B remains by far the best known form of emergency contraceptive, and has been available over the counter - or without a prescription - since 2013.
Dr Bullock of the American College of Obstetricians and Gynecologist's (ACOG) says that this is mostly because 'there was a lot of hoopla and fanfare and money spent when plan B went over the counter. [It was like] free marketing,' she says.
Study - Indiana - University - Prescription - Drug
Furthermore, a new study from Indiana University found that even though a prescription is no longer required for the drug, pharmacists are more likely to refuse to give it to 17-year-old patients - but will say it is over the counter if a teenage boy asks.
But the older, better-known drug actually has some distinct disadvantages, and each form of emergency contraceptive has a unique profile.
US - Food - Drug - Administration - FDA
In the US, the Food and Drug Administration (FDA) has approved Plan B for women to take up to 72 hours after...
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