In which stage does implantation of the embryo occur?

The implantation of the embryo occurs during embryonic development. After fertilization, the embryo is formed and then travels through the fallopian tube to the uterus over the course of several days. Once it reaches the uterus, it undergoes a critical process where it attaches itself to the uterine lining. This process is essential for establishing a successful pregnancy, as it allows for the exchange of nutrients and waste between the mother and the developing embryo.

Fetal development, on the other hand, refers to the later stages of pregnancy, beginning after the embryonic stage when the major structures have already formed. Conception refers specifically to the moment when a sperm fertilizes an egg, while ovulation is the release of an egg from the ovaries. Thus, while each of these terms plays a role in reproduction, only embryonic development encompasses the critical process of implantation.