Hi Whitney --
First off, just to be really careful about this, let me reiterate that these photographs belong to Lennart Nilsson, and are published in his book 'A Child is Born,' copyright 1990. I don't own them, I'm not making money from them, I mean no offense by displaying them. It's a very good book, I recommend if you would like to see more such photographs you purchase the book.
In order, these are --
Embryo at three weeks, side view.
Embryos at four weeks, photographed from the same angles as the children in the pictures along side them.
Embryo at five weeks, portrait then side view.
Embryo at six weeks, side view.