Unfortunately, the emergency hormonal contraceptive Santa Skull Biker Merry Christmas sweater is not effective if you have already ovulated or are about to ovulate. The high dose of hormones in the pills interrupts your menstrual cycle, preventing or delaying your regular mid-cycle surge of a hormone called luteinizing hormone, or LH. This prevents you from ovulating. If you have already had your LH surge for the month, the pills don’t prevent ovulation, and thus don’t prevent pregnancy. Initially, some scientists thought that hormonal emergency contraception could prevent implantation of a developing embryo, and thus prevent pregnancy even after ovulation. However, further research has shown this to be incorrect. If you have already ovulated or are very close,
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Plan B and similar pills are useless. Santa Skull Biker Merry Christmas sweater However, you aren’t out of luck. A copper IUD can be inserted for up to a week after unprotected sex, and it’s more than 99% effective at preventing pregnancy. Unlike hormonal pills, the copper IUD does prevent implantation. This means the IUD can work even after you ovulate. Not having a Plan B won’t sabotage Plan A. It’s often good to have a plan B. But if you don’t, it will certainly make you double-check that only parachute. Now, there is a grey area on this. You shouldn’t take this approach to justify not packing your backup parachute.