The Germinal Stage (Week 1-2)

Germinal Stage (Weeks 1–2)
A mother and father’s DNA is passed on to the child.It occurs when sperm swims to the egg to fertilize the egg and forms a diploid cell resulting from the fusion of two haploid gametes A zygote begins as a one-cell structure is created when a sperm and egg come together. The first week after conception, the zygote multiplies, going from a one-cell structure to two cells, then four cells, then eight cells, etc. This process of cell division is called mitosis, Mitosis is a process and only one-half of all zygotes survive the first two weeks. After 5 days of mitosis there are 100 cells, and after 9 months there are billions of individual cells. As the cells divide different organs and body parts.

Embryonic Stage (Weeks 3–8)
After the zygote divides it becomes

150 cells, it travels down tubes and implants itself in the uterus. When planted the cell becomes an embryo. New blood vessels grow, and forms the placenta. The placenta is a structure connected to the uterus that, and nourishes and get a lot of oxygen from the mother from the umbilical cord. Basic structures of the embryo start to form into areas that will become the head, chest, and abdomen.Which means the baby starts to finally form During the embryonic stage, the heart begins to beat and organs grow and begin to function how they should normally. A neural tube forms along the back of the embryo, developing into the spinal cord and brain the baby starts to look more grown since the spinal cord formed.

Fetal Stage (Weeks 9–40)
When the organism is about nine weeks old, the embryo is called a fetus.A fetus is about the size of a bean and begins to take on the form of a human being.
From 9–12 weeks, the sex organs begin to form.

At about 16 weeks, the fetus is approximately 4.5 inches long and bigger than a bean and more like the size of a grapefruit. Toes and fingers are fully formed and fingerprints form on the tips of the fingers. By the time the fetus reaches the sixth month of forming, it weighs up to 1.4 pounds. Hearing has developed, so the fetus can respond to sounds, which basically mean a lot of movement in the belly of the mother. The organs, such as the lungs, heart, stomach, and intestines, have formed enough that a fetus born premature has a chance to survive outside of the mother’s womb and can form on its own . Throughout the fetal stage the brain continues to grow, nearly doubling in mass from weeks 16 to 28. Around 36 weeks, the fetus is almost ready to be born. It weighs about 6 pounds and is about 18.5 inches long and it is the size of a stack of bananas, by week 37 all of the fetus’s organ systems are formed enough that it could survive outside the mother’s uterus without many of the risks of premature birth. The fetus continues to gain weight and grow in 40 weeks. By then, the fetus has little room to move around and birth becomes

hard.
Prenatal Influences

During the prenatal stage, genetic and environmental factors can affect development either in a good way or a bad way. The developing fetus is completely dependent on the mother for life so if the mother does something. It's important that the mother takes good care of herself and receives good care while she has the baby , which is medical care during pregnancy that monitors the health of both the mother and the fetus. Prenatal care is important because it can reduce the risk of problems to the fetus and the mother during pregnancy. women who are trying to become pregnant or who may become pregnant should discuss pregnancy plans with their doctor so they can be on track of keeping their baby just right.