Re: “parsley as an abortifacient?”
That is one reason.
The other reason is just timing...
College girls going to visit a boyfriend on a long weekend.
Being in a friend’s wedding, the Christmas holiday social scene, holiday or ceremony responsibilities, etc.
If you could just switch your menstrual cycle on and off like a switch, everyone would do it. Every effort to mess with the natural operation of our bodies does more harm than good.