16 Week Fetus: Development and Changes

Source: bing.com

Introduction

At 16 weeks, a fetus is about the size of an avocado, measuring around 4.6 inches long and weighing approximately 3.5 ounces. Although still small, the fetus has undergone significant changes and developments since conception.

Development of the Fetus

At 16 weeks, the fetus is considered to be in the second trimester of pregnancy. During this time, the fetus continues to grow and develop at a rapid pace. It is during this stage that many of the vital organs and systems begin to function.

The fetus’ skin is still thin and transparent, but it is starting to develop a layer of fat that will help regulate its body temperature. The bones in the fetus’ body are also becoming harder and stronger, while the muscles are developing and starting to allow for movement.

The fetus’ digestive system is also developing and beginning to function. The liver is producing bile, which is necessary for digestion, and the pancreas is producing insulin. The fetus’ kidneys are starting to work, producing urine that is released into the amniotic fluid.

Changes in the Fetus

During the 16th week of pregnancy, the fetus begins to show more distinct features. Its face is becoming more defined, with the eyes moving closer together and the ears moving to their proper position on the sides of the head. The fetus’ taste buds are also forming, and it is able to taste the amniotic fluid in which it is floating.

The fetus’ reproductive system is also developing during this time. If the fetus is male, the testes are beginning to descend from the abdomen into the scrotum. If the fetus is female, the ovaries are fully formed and contain all of the eggs that the female will have throughout her lifetime.

The fetus’ nervous system is also developing rapidly. The brain is growing at a rapid pace, and the neurons are starting to form connections that will allow for movement and sensory perception. The fetus is also beginning to develop reflexes, such as the ability to suck and swallow.

Mother’s Changes at 16 Weeks

As the fetus continues to grow and develop, the mother’s body is also experiencing changes. At 16 weeks, the uterus has risen to just above the mother’s pelvic bone. This means that the mother may start to feel the fetus moving, although these movements may not be strong enough to feel yet.

The mother may also experience some discomfort during this time. The uterus is growing rapidly, which can cause some cramping and discomfort. The mother may also experience some constipation, as the hormone progesterone relaxes the muscles in the digestive system.

Conclusion

At 16 weeks, the fetus is rapidly growing and developing. It is during this time that many of the vital organs and systems begin to function. The fetus is also starting to show more distinct features, and its reproductive system is developing. The mother may experience some discomfort during this time, but it is important to remember that these changes are all part of the natural process of pregnancy.