Do you think monster reproducing works the same way as human reproducing?
Curious question! There’s actually little evidence on how monsters are born, and anyway I don’t think the same rule must be applied for all monsters, since they’re all very different, but… BUT!
For example, if I focus on boss monsters… Watching one of the videotapes from the true lab, we can see [or hear] Asgore and Toriel talking. Asgore will say something like “you look so excited to have this child”, which leads me to think that, at that moment, Toriel was pregnant.
So, since Asriel’s birth involved pregnancy, I’ll go with “boss monsters reproduce like mammals do”. I can’t assume the same for other monsters, because as I said they’re all different and I’d have to make headcanons for everyone, [which I won’t do right now].
But yeah, knowing that tape is the only detail in the game about monster birth, I think I have it right. I will believe I’m right.