The baby is about 49cm long and weighs 3300g g, with an average biparietal diameter of 9.2 1.59cm, an average abdominal circumference of 31.343 cm, and a femur length of 7.34±0.53cm. The baby born now is a full-term baby. He is still gaining weight, and these fat reserves will help regulate the temperature of the fetus after birth. With the improvement of living standards, fetuses are getting heavier and heavier at birth, and some fetuses can reach more than 4,000 grams at birth. Usually, boys are born heavier than girls.
Changes of pregnant women at 39 weeks' gestation;
At the 39th week of pregnancy, the weight of pregnant women has increased by about 1 1.3kg, the height of uterus is about 3 1cm-38.5cm, and the abdominal circumference is about 89cm- 100cm. The pregnant woman's uterus has filled most of the space in the pelvis and abdomen, and her stomach looks big, which makes it more inconvenient to move. However, compared with expectation and a little nervous mood, physical inconvenience may not be important. During this time, it is recommended that expectant mothers exercise properly every day, which will help the fetus to give birth smoothly.
Precautions for diet in the third trimester:
In the third trimester, expectant mothers enter the final sprint stage, and the nutritional storage of mothers is particularly important. A safe, healthy and reasonable diet is a necessary prerequisite for a healthy birth of a fetus. Combined with the nutritional characteristics of the third trimester, we should make corresponding adjustments on the basis of the diet in the second trimester.
1. Diversified dietary requirements: In the third trimester, expectant mothers should not only supplement calories, but also pay attention to the supplementation of high-quality nutrients such as protein, clams, calcium and vitamins. They can eat less and eat more meals, which can be increased to more than 5 meals a day. Never take a lot of supplements to avoid obesity and macrosomia (expectant mothers should not gain more than 15 kg during pregnancy).
2, add enough calcium and iron to help the fetus' teeth and bones calcify well and prevent the expectant mother from anemia. You can eat more kelp, seaweed, shrimp, sesame, animal liver, eggs, fish and so on.
3. Increase the intake of plant protein, such as beans and bean products.
4. Reduce the intake of foods with high sugar content, such as fruits, sugar and honey. In order to prevent the fetus from growing too big, it will affect the smooth delivery.
5. Eat more foods with high nutritional value and small size, such as animal food; Eat less foods with low nutritional value and large volume, such as potatoes and sweet potatoes.