When you first find out you are pregnant, it may be quite difficult to understand how a baby develops from a single egg and sperm.
The pregnancy stages start with a tiny thing called the zygote that later becomes the embryo which gets embedded into the lining of the uterus. There it develops into a fetus and this is when we can talk about fetal development. While at the beginning the fetus looks something like an alien and it apparently also has a tail, through the pregnancy evolution it starts looking more and more like a baby and in the end he or she comes to this world fully developed.
Don’t think for a moment that fetal evolution is something simple. There is a lot more going on in your belly than you would imagine. Baby development is a wonderful thing that takes a lot of time for people to understand. During the pregnancy weeks you will have several fetal development ultrasounds and you can also receive fetal development pictures. When asking how does pregnancy evolve you should keep in mind that every baby has his or own pace of development, and the doctors have only guidelines to assess the development of babies.