How many weeks of pregnancy does the second trimester refer to

The second trimester is 14-27 weeks of gestation.

Pregnancy is usually divided into three stages: first trimester is before the end of 13 weeks, second trimester is 14-27 weeks, and third trimester is 28 weeks and later. In the second trimester, the embryo is basically formed, the pregnant woman's abdomen gradually bulges, and obvious fetal movement can be felt. At the same time, pregnant women should pay attention to a birth check every 4 to 6 weeks, and control blood sugar and diet in conjunction with glucose tolerance tests and weight changes. At this time, the growth rate of the fetus is accelerated, and more nutrition is needed. Pregnant women should pay attention to a balanced diet, ensure adequate sleep and proper exercise. At the same time, pregnant women also need regular check-ups according to the doctor's recommendations to understand the development of the fetus in time.