The Morning After Pill is is technically not contraception as it happens after conception but prevents the embryo from attaching to the uterus wall (or something like that)
That’s the normal contraceptive pill that you’d take regularly, the “morning after pill” is for when you’ve realised that you forgot to use any contraception and need to stop that embryo before it grows any more!
I'm now concerned about the billions I flushed in my teen years... (lemmy.ca)