
Oh lawd. No, Plan B should not ever be something you plan to rely on, only a backup when your chosen method fails (broken condom, miss multiple pills, the works). It’s in the name: Plan B, not plan A. It’s a massive dose of hormones, less effective than real birth control, and can’t even work if the timing is wrong. If you want to have sex without a condom and not get pregnant, use a routine hormonal birth control, not Plan B. The calendar method OP mentioned is another can of worms.
Okay okay I know technically it’s marketed and only approved to be used after sex, but if you know HOW levonorgestrel works, and you know your own cycle, you should be able to use it to your advantage to maximize the efficacy right??? Not as a long term birth control of course but using it once should be okay.
Levonorgestrel does the same thing whether you have sex or not because its function is to stop the LH surge in order to delay ovulation. Which then can prevent pregnancy ONLY IF you take it within the correct window of time, as in 1) not too early before ovulation that it’s out of your system before it has a chance to affect your LH, and 2) not too close to ovulation when it’s too late to stop the LH surge or after ovulation
I don’t think they would promote it because it’s probably not good for long term use. Like it could mess up your next few cycles, which means you can’t reliably predict your fertile window. And people would probably take it multiple times in one cycle, which is definitely not good for you. My guess is that if they did market it as a before-sex ovulation delayer, then it would be by prescription only to prevent people from using it too often.
But I’m just thinking that if something goes wrong this weekend (ie condom rips), then plan b will be ineffective because ovulation will already be triggered. The only way plan b would be able to work effectively is if I take it today/tomorrow BEFORE the LH surge. And I don’t want to have sex without a condom, I just wanted a temporary buffer of time to get me out of my fertile window.