In each of the three trimesters the increase is different, but it should also be taken into account the fact that some women initially have low weight, while others - its excess in the form of obesity.
To determine the body mass index, which indicates whether normal weight or not, there is a special table, where:
- up to 18.5 - underweight;
- up to 25 - normal;
- up to 30 excess;
- Above 30 - obesity.
To calculate your BMI, you need to divide the weight by the height in the square.
A doctor who oversees the development of the fetus has a special table for gaining weight during pregnancy, in which the norms are indicated - the maximum allowable threshold for an increase in each week.
Weight gain in the first trimester of pregnancy
The norm for the very beginning of pregnancy is an increase of one and a half kilograms - this is an average. For full women, no more than 800 grams is laid, and for thin women - up to 2 kilograms for the entire first trimester.
But often this period does not correspond to the table of weight gain during pregnancy, because it is at this time that most women have toxicosis. Someone avoids overeating and therefore receives less calories, and someone suffers from indomitable vomiting and even loses weight. Such a state must be under the doctor's control.
Weight gain in the second trimester of pregnancy
From 14 to 27 weeks - the most favorable time in the entire pregnancy. The future mother no longer feels toxic and can afford to eat well. But this does not mean that you need to eat for three. Food should be most useful, but not too high in calories, so that the weekly weight gain does not exceed the prescribed 300 grams.
Doctors not without reason warn the future mother that in the last weeks of pregnancy the weight grows intensively. And if there are all without restrictions in the second trimester, there is a risk of giving birth to a large baby - more than 4 kilograms, and the likelihood of developing diabetes maternity.
Weight gain in the third trimester of pregnancy
If the body weight has become excessive by the last trimester, the doctor can recommend unloading days that will allow to slow down the active weight gain and give the body a rest. Based on the table, weight gain during pregnancy, in the final period occurs quite intensively from 300 g to 500 g per week.
Thus, by the time the baby is born, a mother with normal pre-pregnancy weight can gain 12-15 kilograms, and women, who had originally high weight, should not weigh more than 6-9 kg. The same ladies are allowed to recover up to 18 kg.