When does fetal bone development occur?

The entire fertilized egg develops into a fully formed fetus. The changes in this process are very magical. Usually, the development of the fetus follows a certain order. For example, after a certain period of time, the fetus begins to develop bones. At this time, pregnant women must supplement calcium. Calcium supplementation can promote the development of fetal bones. So when do the bones of the fetus begin to develop?

Fetal bone development time:

When do fetal bones develop? The fetus' skeleton grows very quickly, and although it is imperceptible, time will give the answer. As the fetus's bones grow, the pregnant woman's belly will feel obvious changes. Generally speaking, at what time during pregnancy do the fetus' bones begin to develop? This issue really needs to be understood.

Week 13

During this week, the baby has begun to take human form. The fetus's brain grows larger and larger, accounting for about half of the entire body. In the past, the fetus absorbed oxygen and nutrients through the skin, but now it obtains rich nutrients from the mother through the umbilical cord on the placenta. The key organs of the fetus's growth will also be completed during these two weeks.

The baby is now about 6.5 cm long, with fingers and toes completely separated, parts of the bones beginning to harden, and the rudiments of joints appearing. From tooth germs to nails, the fetus is busy moving, sometimes kicking its legs, sometimes stretching its body, looking like it is dancing water ballet. The fetus' heart beats stronger and its internal organs are almost formed. In addition, the placenta has been improved and the connection with the mother is closer, so the possibility of miscarriage has been greatly reduced. As the placenta function improves, the mother's supply of nutrition to the fetus is improved.

4 months of pregnancy: The fetus' bones begin to develop

Week 14

The baby is about 7.6 cm long and has gained slightly more weight than last week. His (her) forehead becomes more prominent, the distance between the eyes is shortened, and the eyelids are still tightly closed. The number of neurons in the fetus increases rapidly, synapses are formed, and the fetus's conditioned reflex ability is strengthened. At this time, the skin of the fetus thickens, becomes rosy and shiny. As the color of the fetal skin becomes redder, the skin also thickens, and has a certain defense ability, which is beneficial to protect the fetus's internal organs. The fetus' heart beats more actively and its internal organs are almost fully formed. The external genitalia can already distinguish between males and females. The bones develop further, the muscles become stronger, and the amount of amniotic fluid increases, so the baby's hands and feet can move slightly in the amniotic fluid. At this time, the placenta is also formed, and the connection with the mother is closer, and the possibility of miscarriage is greatly reduced.

Week 15

The fetus is 7.6 cm to 10 cm long and weighs 28 grams. Fingerprints have appeared, the fetus's skin has thickened, become rosy and shiny, and has a certain degree of defense, which is beneficial to protecting the fetus's internal organs. The fetus' heart beats more actively and its internal organs are almost fully formed. The external genitalia can already distinguish between males and females. The skin is covered with a layer of fine hair, which makes the whole body look like a thin velvet blanket. This layer of hair usually disappears at birth. The fetus' eyebrows begin to grow, and the hair on the top of the head also grows rapidly. The texture, density and color of the hair will change after birth. Bones develop further and muscles become stronger.

Week 16

The fetus is 10 to 12 cm long and weighs 50 grams. The skin is covered with a fine layer of hair that is usually gone at birth. The fetus' eyebrows begin to grow, and the hair on the top of the head also grows rapidly. The texture, density and color of the hair will change after birth. As the placenta's function gradually improves, the development of the fetus accelerates. The fetus begins to make many movements in the womb, such as clenching its fists, squinting its eyes, frowning, etc., and also begins to suck its thumb. The fetus begins sucking its fingers in the mother's womb at around 12 weeks of pregnancy, which is called sucking movement. A baby cannot survive if it cannot suck milk. The fetus has already started practicing this important sucking movement.

The baby grows to be about 12 cm tall and weighs about 50 g. Sunken areas begin to appear around the eyes. The placenta is finally completed and nutrients are taken in through the umbilical cord.

A few months into pregnancy, women can feel that the fetus's bones are actually developing, and it is very obvious. Your belly is getting bigger and bigger, which means the baby is growing inside. So during this period, you must take good care of yourself, eat what you should eat, and never eat what you shouldn't eat, so as not to affect the baby.