Menstruation is the shedding of the uterine lining. It doesn't involve the direct loss of arterial blood through some kind of gaping womb wound.
Your point? Before you even try to talk about it, name me one hybridized animal that comes from a period/non-period species pair and what if any problems it has. (The main one is there aren't any.)
This is a hybridized creature. Its biology is totally unknown to us, considering we have no examples to base a guess on, and may not exactly mesh well. Menstruation is something Cryvans don't do, so if their body is suddenly subjected to then need, your attempt to state that it won't result in serious problems is, at best, silly. I mean, I could change it to resulting in a womb full of dead bits floating around that aren't being properly expelled and are necrotic and massive infection. That's also possible.
We're discussing two incompatible systems and you want to say that they won't
do something possibly catastrophic if they're mashed together? That's bull****.
Overt menstruation of the human type is fairly rare in mammals, and it's a common misconception that other mammals (like dogs, for instance) have 'periods' in the human sense.
Aware of this, still waiting on that point.
The Cyrvans probably simply reabsorb the uterine lining internally, a process called covert menstruation.
Either way you're just disposing of the uterine lining one way or another. It's doubtful it'd cause any fatal flaws in hybrids. Sterility, sure, but that's par for the course.
Still waiting on that applicable point to the discussion.
Yes because we're not discussing an alien life form at all and all our experience with hybridized creatures from Earth is totally applicable!Oh wait.