Over the weekend, the unthinkable happened in America, with reproductive rights going back a century or two.
The US Supreme Court overturned the landmark 1973 Roe v. Wade ruling that recognised a woman's constitutional right to an abortion and legalised it across the country, handing a momentous victory to 'pro-life' advocates who want to limit or ban the procedure.
The court, in a 6-3 ruling powered by its conservative majority, upheld a Republican-backed Mississippi law that bans abortion after 15 weeks. The justices who voted to overturn Roe v. Wade believed the original constitutional protection enacted in 1973 was wrongly decided.
Very soon after the overturn, eight states legislated to ban abortion in all circumstances, including rape and incest. An additional 13 states are likely to adopt the ban, while a further nine states are uncertain.
So what has this news got to do with period tracking apps you may ask?
According to women's advocates across the US, many are concerned anything and everything will be used against them if they're found to have had an abortion deemed illegal in the state it was performed in. And period trackers could play a part in that equation.
Watch: Speaker of the House Nancy Pelosi's speech on Roe v. Wade being overturned. Post continues below.