Why? It’s a logical outcome of the combination of mass surveillance and draconian anti abortion laws. This is the sort of shit the judicial construction of the implied right to privacy was kinda built around stopping. This is just straight up the sort of shit Snowden warned us of.
So yeah, the federal government (and likely state as well), who have the data from your personal devices to understand far more of your sex life than you want your friends knowing, much less your Senator, are able to purchase or subpoena data from menstrual tracking apps and will do as the law tells them to. The law, meanwhile is written by a group of people who are vastly disproportionately elderly men with little to know understanding of any branch of science or medicine. A group notable for comments like the assumption that ecoptic pregnancies can be replanted and that presenting a snowball disproves global warming. The one gynecologist of note to have been in Congress in recent memory being Ron fucking Paul, who incidentally was anti choice.
To sum my previous paragraph to a thesis statement: people who have no idea how bodies work and couldn’t tell a Skene’s gland from a vas deferens and disproportionately think pee comes out the vagina get to decide the rules by which people who know every aspect of your life that they choose to look for decide if your menstrual irregularities are normal or an illegal abortion.
The vaccine one would probably be better as: “independent thinking researchers developed a means of using your own body’s immune response to prevent diseases with a mere injection. Some of them even refused to patent it. But then the media started lying to you about them, trying to get you to stop accepting these miracles? Why, just so some companies could make more money selling you proprietary snake oil to keep you comfortable while you’re sick.”