How many months does the fetus grow fastest

First of all, every period of fetal development is critical. If we talk about the most critical condition, it is the first three months of pregnancy, because this period is a critical time for the development of the fetal nervous system. If it is affected by external factors or other reasons, it is easy to cause fetal malformations and miscarriage. The fastest growth and development should be from 27 to 36 weeks of the fetus, that is, from seven to nine months.

3-6 months of pregnancy

This stage is the first peak period of fetal brain cell proliferation, with the number of fetal brain cells increasing rapidly at an average rate of 250,000 per minute. At this time, the fetus needs a lot of nutrition to meet the growth needs of brain cells. Malnutrition will cause cell division to slow down, the number of brain cells to decrease, and the fetus's intellectual level to develop limited.

7-9 months of pregnancy

Both the number and volume of cells increase, which is the second important stage of brain cell growth and development. During this stage, the number of brain cells continues to increase, while the volume of brain cells begins to increase, dendrite branches increase, and synapses begin to form.

3-6 months after birth

The number of brain cells no longer increases, but the volume of brain cells continues to grow fatter and larger, affecting the child's brain nerve information transmission function. At this time, breastfeeding mothers should increase the content of brain nutrients in breast milk, so that their children can absorb more nutrients through breast milk and improve their brain development.

Fetal weight

The fetal weight can be calculated through B-ultrasound data, but because the measurement is not completely accurate, there will be some discrepancies in the calculated fetal weight.

Common calculation formula: Y=1.07*BDP*BDP*BDP+0.3*AC*AC*FL

Y refers to the estimated fetal weight in g, where BDP is the biparietal diameter of the fetus, AC is the abdominal circumference of the fetus, and FL is the femoral length of the fetus. These data can be found on the ultrasound report.

For example, the ultrasound values ​​of a pregnant woman at 38 weeks: Biparietal diameter = 9.4cm, abdominal circumference = 33.2cm, femoral length = 7.2cm

Then the fetal weight = 1.07*9.4*9.4*9.4+0.3*33.2*33.2*7.2= 888.72488 + 2380.8384= 3269.56328g≈3270g=6.54 catties