This occurs from 12 weeks to 38 weeks. During this stage, there is no more structure development but he baby continues to change physically. When the stage the baby grows in length and weight. Sex organs began to appear clearly during the eighth or ninth weeks of development. The fetus begins to learn how to control his/her own muscles, this may follow by a kick in the fifth month. Organs start to finish developing so when it is born it can digest, and breath on its own. While the fetus grows the brain matures which causes it to use sensory input like hearing, smelling – with motor output like movement of muscles. When the baby fully developed, water should break between 38 -42 weeks. Sometimes a baby will could early, this is called premature birth. Normally when a baby is past due the nurse will break your water for you so he/she can come out of the womb. Premature births are caused by many factors like environment, and genetics. A lot of premature births come from parental factors like smoking, drinking alcohol which can lead to many breathing problems like asthma and FAS (fetal alcohol syndrome). Fas is a disorder where the brain has abnormalities, heart defects, and a small head. According to Psychology In Your Life, “In the United States, FAS is estimated to occur in between .2 and 2.0 cases per 1,000 births … could be higher.” (Grison, 117) This can cause mental retardation and behavior problems. Another …show more content…
Each stage of prenatal development is significant to form a fully, healthy baby. It is important for the mother and father to do whatever it is possible to keep the baby healthy if that means to stop smoking, and drinking alcohol. It is also important for the mother to eat healthy so the baby can develop properly during the embryonic stage. A fetus can give a person the most hell but in the end it will be worth it because holding him or her is going to change your