There is no maximum weight limit that can be applied to all pregnant women. The recommended gestational weight gain will depend on the woman's body mass index (BMI) at the time of becoming pregnant.
Thus, an underweight woman should gain more weight during pregnancy than a woman with a high BMI (overweight or obese).
In the case of a woman with an adequate weight (BMI between 18.5 and 24.9), she should gain between 11.5 and 16 kilos (25 - 35 lb) during pregnancy.
However, it should be taken into account that the recommended weight gain will be higher in the case of twin or multiple gestation.