How old is the 19-week fetus?

How big is the fetus at 19 weeks? The fetus at 19 weeks is generally a finger under the umbilicus, the fetal length is about 20 cm, and the fetal weight is about 800 grams. It is recommended that the diet containing iron and calcium should be strengthened at 19 weeks of pregnancy, and calcium tablets should also be supplemented. Because at present is the baby growth and development of the critical period, the baby is also prone to calcium deficiency, pregnant women are prone to leg cramps, so it is recommended that 19 weeks of pregnancy to calcium up to 1000 mg a day, at the same time it is recommended that 19 weeks of pregnancy to diet diversification, eat more fresh vegetables and fruits, eat more high-quality protein food, eat more crude fiber food.