User Amada44 on Wikimedia made a public domain more "cliparty" image based on the same old textbook I used. I like the faded look of the one I synthesized, but providing this one too. (The placenta is the red part on the left!)
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Placenta and Fetus free icon was designed by j4p4n for icons Png and presented to its users.
j4p4n
3/5/2018