What event initiated the specialized branch of medicine called assisted reproductive technology?

Answer:
I suppose some might say the birth of Louise Brown, the first "test tube baby" (baby conceived via in vitro fertilization). But there were certainly other ART techniques prior to that event.
First answer by Peakaytea. Last edit by Peakaytea. Contributor trust: 149 [recommend contributor recommended]. Question popularity: 0 [recommend question].