Folks, it doesn't matter how technical you want to be.
In this gamefied Universe, pregnancy only happens when some stage in the story of the relationship between the MC and that woman is reached. And even then, only if YOU the player wants it to happen.
There's no ovulation period, no period even, no fertile days, no super sperm... all that doesn't really exists. Only a variable that when you answer Yes is turned to 1. Done.
Don't even start with who knows more about fertility, ovulation or female reproductive cycles. None of that applies here. It's a fucking computer code. So, stop being obtuse. This isn't real life, it's a computer simulation and the rules that apply are those made by it's creator. That's it. That's all.
Bloody hell. Sometimes I feel that I'm in some alternate reality like Idiocracy.
Peace