Development of the embryo and Fetus in woman's wob

By Adimu Nihuka Jr

During the pregnancy the woman takes three periods called trimester. These three trimesters will be discussed below:-

The First trimester

This will be at first three months after conception is the first trimester. By the end of second month, the embryo is recognizable as human and is called fetus. At the end of the first month, the embryo has heart beat, a two- lobbed brain and spinal cord.

After two months, the embryo has started to form arms and legs, fingers and toes, ears and the beginning of eyes and facial features.

At the end of third month, the major internal organs have been differentiated and have began to function.

The limbs have contained to develop and fetus can be visible identified as male or female. 

By the end of first trimester, the fetus is about four inches (10.16cm) long and weighs about one ounce (28g).

The second trimester

By the end of four months, finger nails and toe nails, and eye blows and eye lashes have developed. 

Teeth began to form, lips appears and head hairs might starts to grow. Movement of fetus can be felt by the mother.

During the fifth month, a fetal heart beats can be detected using a stereoscope.

During the fifth and sixth moths, growth is rapid. By the end of second trimester, the fetus begin to open its eyes. It is about 12 inches (30.48cm) long and weights approximately 1.5 pounds (0.68kg).

The third trimester

If a baby is born prematurely at the beginning of seventh month, it has 20 percent chance of surviving. Optimal development occurs at about 40 week's gestation.

A pre-term baby, or pre- mature baby, is a baby that is born before 37 weeks of pregnancy.

A baby born between 38 and 40 weeks of pregnancy is considered to be full- term. Full- term babies are usually 19 to 20 inches (48.26 cm to 53.34 cm) long and weights between six and nine pounds (2.7kg and 4.05kg) by the end of third trimester.