A research team at the University of Alberta in the United States has warned that pregnant women who gain a lot of weight in the early days of pregnancy are three times more likely to give birth to large and obese children.
A study of 172 pregnant women found that women who gained weight in the first week of pregnancy gave birth to relatively large and long babies.
On the contrary, it is said that if a woman gains weight in the last month of pregnancy, it will not make much difference.
This research points out that it is important to teach women who are preparing to become mothers to eat a balanced diet in the first half of pregnancy but not to gain too much weight.
Lead researcher Margie Davenport said: "Pregnant women and health workers need to understand and follow the guidelines on weight gain during pregnancy to build a healthy mother and child base."
It is said that pregnant women should pay attention to their weight from 16 to 25 weeks of pregnancy.