[skeptoid]

Many were taught the fetus is a "mass of tissue" until some nebulous stage of gestation. In fact I knew a physician who sincerely believed the embryo takes the same forms of a progression of lower species during development. He also saw this as a proof of Darwinism.

[debaryfl]

Yes, indeed. There's even a catchy phrase for it:
"Ontogeny Recapitulates Phylogeny"

[basil]

I'm happy that I never met that doctor!