The methods of long fetus include weight control, supplementation, and dietary precautions. 1. Weight control: During pregnancy, if you want to have a long pregnancy, you have to do reasonable exercise, eat half an hour after the appropriate activities, do not often sit and stand for a long time, and do not do strenuous exercise. 2. Supplementary nutrition: pregnant women who want to grow a baby can eat more food rich in protein, fat, calcium, iron and other nutrients in moderation, such as pork, mutton, beef, eggs, chicken liver, pig liver, soybean products and so on. 3. Dietary precautions: Do not overeat in terms of diet, do not often eat high-calorie, high-fat food, so as not to lead to obesity. After pregnancy need to pay attention to nutritional supplements, regular good pregnancy maternity examination, abnormalities in a timely manner to seek medical attention.