Reproduction : Gestation - Zygote To Embryo To Fetus In Humans

The period of development in the mother's body, lasting from ___ to birth is known as ___.

In the ___ of gestation the developing offspring is described as ___.

The delicate structure of an embryo is ___, ___ and ___ by the ___ and ___ from early on in its development.

The outer layers of the ___ of the ___ that grow and give rise to the ___ and ___.

By the end of 2 months' development, the beginning of the principal adult ___ can be detected and the placenta is ___; during the rest of ___ the developing offspring is called a ___.