Answer:
Nutrient and waste requirements for the developing fetus are handled during the first few weeks by diffusion through the endometrium
Explanation:
Human gestation
In the gestation period , the time is bifurcated to three equal time interval known as the trimesters .
During the first trimester , the waste and nutrition are handled by endometrial lining via the process of diffusion .
During this trimester , the outer outer layer of embryo merges with the endometrium and leads to the formation of placenta .
Now, this organ takes up the responsibility for the nutrients and waste , and mother's blood thereby passing nutrients to the placenta and removing waste from it .
