The pregnancy cycle is measured in 4-week increments, so 19 weeks of pregnancy is 4 months plus 3 weeks, which is the middle trimester. In clinical practice, the pregnancy cycle is considered to be 1 month in 4 weeks, therefore, for the duration of pregnancy, the calculation is done in weeks of gestation and 19 weeks of pregnancy would be more than 4 months. Seven days is one gestational week from the first day of the last menstrual period. The expected date of delivery is 40 weeks of gestation, and 37 weeks of gestation is called a full-term pregnancy. Usually pregnant women can feel the fetal movement at 18-20 weeks of pregnancy, so the fetus develops normally at 19 weeks of pregnancy, and pregnant women can feel the fetal movement themselves. Pregnant women can judge whether the fetus is well in the uterus according to fetal movement or whether the fetus is developing normally according to the fetal biparietal diameter and femur length through ultrasound examination. In addition, pregnant women at 19 weeks of pregnancy can undergo non-invasive prenatal testing to rule out fetal abnormalities. Also, attention should be paid to routine blood tests to rule out anemia in pregnant women.