The pioneer and master of the technique is the Swedish microphotographer Lennart Nilsson, who gave us the first live fetus pictures in the early 1970s. His electron microscopy work is magnificent and looks like fine art.
Unfortunately, his imagery came along too late to prevent Roe v. Wade, which was based on the ignorant assumption that life isn't present at conception. A look at all stages of conception in Nilsson's photo books will testify otherwise.