By the end of the third month, your baby has formed all of its vital organs such as the heart, lungs, and kidneys. Also formed are the arms, legs, and the head. The baby weighs about one ounce and is three inches long.
In addition, the placenta has formed. This is attached to the inside wall of the uterus (womb) on one side and to the umbilical cord on the other. The umbilical cord then goes on to attach to what will be the baby’s belly button. Food or nutrition from your bloodstream travels through the placenta into the bloodstream in the umbilical cord and feeds your baby.