sources:
https://onlinelibrary.wiley.com/doi/abs/10.1002/dev.20506
https://www.cell.com/current-biology/fulltext/S0960-9822(17)30580-8?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982217305808%3Fshowall%3Dtrue#bib5
https://nucubaby.com/blogs/articles/whats-it-like-in-the-womb