ANATOMY

Detailed explanation-1: -This process is called implantation. Within the blastocyst, the inner group of cells will become the embryo. The outer layer will give rise to part of the placenta, which will nourish your baby throughout the pregnancy.

Detailed explanation-2: -The embryo changes from a flat disc to a curved, C-shape as a result of the head and tail folds. Limb buds begin to appear on the side of the trunk. These will later develop into arms and legs. The neural tube forms, which will later become the spinal cord and brain.

Detailed explanation-3: -What does my baby look like? Your baby, or embryo, is about 2mm long (about the size of a poppy seed) and growing rapidly in your womb. It’s protected by an amniotic sac, which is filled with cushioning fluid, and attached to a tiny yolk sac that provides all the nourishment it needs.

Detailed explanation-4: -At 4 weeks pregnant, you might experience a bit of bloating and cramping particularly in your abdomen, as your uterine lining is getting a bit thicker, and the swelling means your womb is taking up more space than usual.

Detailed explanation-5: -Implantation, the process whereby the embryo embeds itself into the wall of the womb, begins by the end of the third week and is completed during the fourth week of pregnancy. At 4 weeks, the embryo is less than 1/100th of an inch long.