In the 5th grade unit 'The Birth of Animals,' the focus is on relating the growth of eggs and fetuses to the passage of time.
In a small study of eight cats at early stages of pregnancy, researchers detected 19 different kinds of microplastic particles in fetuses from two cats and in the placentas of three cats. Ilaria ...
New research in mice and pigs shows that the placental hormone GDF15 drives fetal growth by activating a STAT3-IGF2 signaling ...
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