How the baby weights grow in the fetus?

When pregnant, the mother like to eat some food that higher in glucose. From here high blood glucose level in mother will increase and these will brings extra glucose to baby and cause baby to put on extra weight. When baby get the ideal weight that is no problem will occur when birth. However, when baby get over weight, it will difficult the mother to give a birth. At this point, another alternative solution have used such as an operation, vacuum of baby, corset and so on will used.