As a female gains weight during pregnancy, usually about 7 to 8 pounds is attributable to the weight of the infant at birth. The rest of the weight is distributed throughout the mother in various tissues developed during pregnancy. These tissue include the placenta, amniotic fluid, increased breast tissue, expanded blood volume, and fat storage and muscle. These all help support the mother and fetus during pregnancy and after birth. Even the mother's bones will become a little denser during pregnancy.
Weight gain during pregnancy is attributable to baby weight as well as supportive tissue for the mother.
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