The term "pregnancy weight" refers to the weight gained by a woman during her pregnancy. This weight gain is necessary for supporting the growth and development of the fetus, as well as providing adequate nutrition for the mother's body. The amount of weight that a woman gains during pregnancy can vary greatly depending on factors such as her starting weight, the number of babies she is carrying, and her overall health. Generally, women are advised to gain between 25-35 pounds during a normal pregnancy, with the majority of this weight gained in the second and third trimesters.