A 17 week pregnant belly generally shows pregnancy, and obese people have bigger bellies. At 17 weeks pregnant, the bottom of the uterus is about midway between the belly button and the pubic symphysis, and the fetus has developed. Most pregnant women can already see a distended abdomen in profile. However, some slender pregnant women may not be too obvious yet. When a pregnant woman lies down, the bottom of the uterus is in the middle of the navel and the pubic symphysis. Some pregnant women can be conscious of fetal movement at this time. During the 17th week of pregnancy, the fetus develops fast and the demand for nutrition will increase. Pregnant women should pay attention to increase nutrition, pay attention to dietary balance, to ensure dietary diversity. Pregnant women can undergo Down’s syndrome screening or non-invasive DNA test during regular checkups to determine the risk of fetal malformation. If a high risk is detected, further amniocentesis tests may be performed.