Average maternal weight gain during pregnancy is 11-12 kgs

3 Simple Factors Affecting Maternal Weight Gain During Pregnancy:

A) Pre Pregnancy Weight:  If the pre pregnancy weight is more than normal (obese), there is a tendency to gain excessive weight during pregnancy.

B) Socio-economic status: Women from higher socio-economic group have more weight gain as compared to women from lower socio economic group. This is because malnutrition prevents optimum weight gain.

C) Associated Conditions: Women with "gestational diabetes mellitus", "twins" and "polyhydramnios (excessive liquor)" have higher weight gain during pregnancy.