The dialogues are well written and interesting, and the game is great !
Just it always feel strange hearing people say that period are 28 days when for me and most people I know it's very different by person and irregular for a lot.
Also apps that watch menstruation cycle can be very dangerous, because it's such sensitive information. It can be very risky, for example for people in some abusive relationships or in countries where abortion is illegal. So you need to be careful before recommending it to people, there are precaution to take at least.
Otherwise I think it's great to make an informative game like this !