I was watching a Crash Course on Biology YouTube video by Hank Green: Great Glands - Your Endocrine System. Hank humorously describes a sex determination experiment by Alfred Jost as follows (beginning at time 9.17 in the video):
So, he, ah, very carefully... very, very carefully (and this is a little disturbing) removed bunny embryos from their mother, and then, also very carefully, removed the part that would become the ovaries or the testes from the bunny embryos. And then, also very carefully, he put the embryos back in the momma rabbit.
What Jost found, after the bunnies were born, was that the ones that he performed the surgery on turned out to be girls. So, in the absence of gonads, and therefore hormones that specifically instructed the development of testes and the growth of a pee-pee and a deep bunny voice, he discovered that the default setting for mammalian embryos is "make it female".
Q: How did Alfred Jost actually perform this experiment?
Essentially I'm after a less superficial description of how Jost implemented this experiment in practice.
I did a bit of Googling; what I found was consistent with Hank's description, but still omits a description of how Jost excised rabbit embryo gonads (instead just asserting that he did it).