There seem to be a lot of different levels of maternal support for unborn offspring, ranging from „shelter“ by carrying eggs until they hatch to full life-suppo

There seem to be a lot of different levels of maternal support for unborn offspring, ranging from „shelter“ by carrying eggs until they hatch to full life-support like mammals offer it. https://en.m.wikipedia.org/wiki/Viviparity https://en.m.wikipedia.org/wiki/Viviparity