The second child’s belly is obviously larger than the first child may be physiological reasons, or it may be caused by the twin pregnancy, or gestational diabetes, edema during pregnancy and other pathological conditions lead to. 1. Physiological reasons: the skin of the abdomen of the second pregnant woman is more loose, so the bulge of the abdomen of the second child may be more obvious. At the same time, when pregnant with a second child, the intake of nutrition is more, the fetus will also be larger than the first child. 2. Twin pregnancy: if the second child is pregnant with two children, the abdomen will be larger than the first child. 3. Gestational diabetes: Pregnant women who have gestational diabetes may be complicated by a large fetus, which will result in a larger abdomen. 4. Edema during pregnancy: pregnant women with hypertensive disorders of pregnancy, or complications of kidney disease, abdominal edema, pregnant women abdomen will appear large. During pregnancy, you should pay attention to regular maternity checkups, and if any abnormalities occur, you need to seek medical treatment in time.