Board Thread:General Discussion/@comment-26370576-20170525000610

Kevin Feige has made great efforts to set the MCU much closer to our own reality than Marvel's Mainstream.

It is much more likely, given our modern understanding of biology, that to create viable, never-mind fertile, offspring between very different evolutions would take some very intentional genetic engineering.

Regarding Krylorians, Rhomann Dey's Partner and Child:  Unless there is very specific confirmation, it should be considered ridiculous that Krylorians posses some species ability to propagate with any other species. While I've never seen any confirmation that Rhomann Dey's child is actually his biological offspring, if she is, she was likely conceived, if not gestated outside the womb.

Regarding Peter Quill:  Even with Quill, it is much more likely that his zygote was specifically designed, then implanted into Meredith's womb. As Meredith knew that Ego was from the stars, this could have happened with or with out her knowledge. On that note, there is absolutely no reason to expect that her pregnancy followed the human norms. For all we know, it could have lasted one week or one year. 