Egg fertilization and embryo transfer

When the sperm reaches the egg, fertilization occurs. From here, the embryo generated will move through the fallopian tube until it reaches the endometrium, where implantation will take place. At this point the development of the fetus will begin and, therefore, the pregnancy.

From this point on, the pregnant woman will undergo a series of changes as the pregnancy progresses, but the fetus will also notice them.