A new study funded by the Centers for Disease Control and Prevention showed the effect of weight gain during pregnancy on obese women (BMI equal to or greater than 30). The study of 1,656 obese women found that most of them gained too much weight during pregnancy, then, on average, kept on 40 percent of the weight one year after they gave birth. Nearly three quarters of obese women gain too much weight during pregnancy. The study also found that younger women and first-time mothers were most likely to gain too much weight.
Unfortunately, the more weight gained means the harder it is too lose and the longer it stays on. The increased weight also increases the risk of pregnancy and delivery complications like diabetes, pre-eclampsia, C-sections, and birthing injuries. New guidelines recommend that obese women with a BMI over 30 should gain only 15 pounds during their pregnancy.