The fetus stage of development lasts from the 9th week until birth.
By the beginning of this stage, all major body organs and systems are formed and are developing.
The mother and fetus are connected by the umbilical cord. It allows trading of nutrients from the mother’s body for waste from the baby’s body.
The fetus continues to grow and develops eyelids, fingers and toes, and the other body features. Soon the eyelids open and the fetus is not only able to open his or her eyes, but can sense light. The fetus is able to hear voices. The fetus develops a nose, tongue, and skin.
As the fetus develops, the mother gets larger. The baby may be born any time after the thirty-eighth week. If born before the thirty-eighth week, the baby is called premature. If the baby is born after the fortieth week, he or she is called post mature.
