Level 1: Embryo development at 11 weeks of pregnancy. At 11 weeks of pregnancy, the embryo has developed to the size of about 3 months, about 5 cm long and weighing about 8 grams. At this time, the baby\’s organ structure has been basically formed, and the proportions of the head and body are gradually approaching those of adults. During this period, the baby\’s brain, nerves, heart and other important organs also begin to further develop. Level 2: Physical changes of the mother at 11 weeks of pregnancy. At 11 weeks of pregnancy, the baby