照抄了专家的理论根据"First of all, your feet maybe swollen, they may also be carrying a little extra fat if your weight gain has been on the high side, on tope of all that, they may be spreading; though they play no part in childbirth, the joints in you feet (along with all your other joints) are loosened up by hormones preparing for delivery. the swelling in your feet will go down after delievry and the weight will probably be lost. But though the joints will tighten up, it's possible that your feet will be permanently larger - by as much as a full shoe size."