In the first weeks, all major organs and limbs are made in the first weeks. The first thing that is formed for an embryo is the brain, spinal cord, and heart. We as humans share DNA with monkeys, dogs, fruit flies, and some with daffodils. In the second month, the embryo starts to develop eyes and fingers. On week eight the embryo becomes a fetus when an embryo stops using the yolk sack for nutrition. The fetus starts to depend on the mother for nutrition and the mother starts to have cravings on what to eat and what not to eat. The fetus is also responsible for releasing hormones that can give the mother morning sickness.
On week nine the fetus begins to move and twitch to strength the muscles and joints. The brains also start to take control of the heart rate and the rest of the body. At week 10 the doctor can give the mother the first ultrasound. The ultrasound can give an estimate due date on when the baby is supposed to be born. The doctor also could find out if there is any possibility of any birth defect. Recently development in new technology has made it possible for 3-D and 4-D scan to see the fetus. Also if your mother has unidentical twins in the family then it is like you will possibly have twins. …show more content…
At week twelve the fetus goes into the second trimester which is the middle stage of the pregnancy. Miscarriages are most likely to happen in the first trimester when the fetus is developing. Some miscarriages are sometimes mistaken for a heavy period. After four months the fetus began to move a lot more since the body has developed and movement of all limbs starts to take place. Some fetus can start to began to open their eyes and know have their own fingerprint. The fetus sex can be determined as well during the middle trimester of