The egg could also harden gradually when exposed to air, as the vagina is acidic. Especially if fertilization occurs outside the body, like with amphibians and fish. Of course, there would need to be a liquid medium, but that could also be released with the egg.
The egg could also harden gradually when exposed to air, as the vagina is acidic. Especially if fertilization occurs outside the body, like with amphibians and fish. Of course, there would need to be a liquid medium, but that could also be released with the egg.
Sure but what would be the advantage in human s case?
It’d be easier to pass a larger egg if it’s soft, even if it’s accompanied by a bunch of fluid.