Even though they put the embryo' s in your uterus it still can change direction and go toward the fallopian tubes. This is the period
where it had not implanted itself yet. I would say the first 72 hours after
transfer. The percentage of that happening is about 3% for ivf
. When I had an ectopic pregnany I did have the same symptoms as a regular pregnancy except I kept on getting a sharp pain on my side.