How big is the baby at 18 weeks of pregnancy

After pregnancy, a woman's body will become very sensitive. Some of our activities in life will have a certain impact on the fetus. Of course, pregnant women also need to pay special attention to the development of the fetus so that they can better maintain it. After 18 weeks of pregnancy, the baby has developed a lot. Next, we will introduce to you in detail the issue of how big the baby is at 18 weeks of pregnancy.

After pregnancy, expectant mothers are always concerned about the size of their belly. Usually, the belly starts to show at 4 months of pregnancy, starts to get bigger at 5 months of pregnancy, and is very obvious at 6 months of pregnancy. Of course, the above is only a general situation. There are still big differences between each pregnant woman. For example, some pregnant women still don't have a very obvious belly at 5 months of pregnancy. This is also possible, but in general, there is no necessary relationship between the size of the belly and the health of the fetus.

At 18 weeks, the fetus is about 20 cm long and weighs 200 grams. The average biparietal diameter was 4.25 ± 0.53 cm, the average abdominal circumference was 12.41 ± 1.89 cm, and the femur length was 2.71 ± 0.46 cm.

The pads on the fetus's fingertips and toes have formed, and fingerprints are beginning to appear. His little eyes moved to the correct position, his ears moved up toward his head, fur began to cover his entire body, and his intestines began to gurgle.

At this time, the fetal skeleton can be clearly seen through CT. If you are having a boy, your baby's genitals are already visible and the prostate is forming.

At 18 weeks of pregnancy, the mother's weight increased by about 2.7 kg. The two originally parallel rectus abdominis muscles in the pregnant mother's abdomen gradually separate and stretch to both sides of the body (the abdominal circumference is approximately between 76-89cm) to accommodate the growing uterus. The buttocks of pregnant mothers will also become wider and thicker, mainly due to the influence of progesterone. On the one hand, fat is easy to accumulate, and on the other hand, the stability of the sacroiliac joint and pubic symphysis on the pelvis will deteriorate. Coupled with the pressure of the fetus, the gap of the pubic symphysis will become wider.

The above content is an introduction to how big the baby is at 18 weeks of pregnancy. Because the situation of each pregnant woman is different, and of course the development of the fetus is also different, these situations still need specific analysis. If you want to know the condition of the fetus, you can calculate it according to the formula, or go to the hospital for formal examination.