If successful, an embryo will implant in the lining of your uterus about six to 10 days after egg retrieval.

At what stage is an embryo implanted in IVF?

IVF embryos are usually transferred on the second or third day after egg retrieval, at the four to eight-cell stage. The IVF embryos must continue to grow for two or three more days to reach the blastocyst transfer stage (100-150 cells) before they are ready for implantation into the uterine wall (endometrium).

When does embryo implant after IVF transfer?

Timing of embryo implantation in humans

Human blastocysts should hatch from the shell and begin to implant 1-2 days after day 5 IVF blastocyst transfer. In a natural situation (not IVF), the blastocyst should hatch and implant at the same time – about 6 to 10 days after ovulation.