Crossing legs during pregnancy may cause back pain, affect fetal health, blood clots, preterm labor and other hazards. Crossing the legs itself is not a good habit, women during pregnancy is recommended to develop good habits, avoid irregular work and rest, stay up late, etc., regular checkups to understand the condition of the fetus. 1. Low back pain: Crossing your legs can cause low back pain, pelvic pain, etc. Crossing your legs after pregnancy will be more obvious. The main reason is that crossing your legs can lead to spinal imbalance, and the load on the thoracic and lumbar vertebrae of pregnant women is relatively large, so crossing your legs for a long period of time may result in too large a difference in the height of the hip joints of the two sides, leading to more serious low back pain. 2. Affect the health of the fetus: If a pregnant woman gets up in a hurry while keeping her legs crossed, her center of gravity will be very unstable, and the risk of falling will increase, thus affecting the health of the fetus. 3. Blood clots: If you often cross your legs during pregnancy, with the growth of the fetus, the pregnant woman’s lower limbs should be weight-bearing, and the lower limbs will have poor blood circulation, thus increasing the risk of blood clots. 4. Premature labor: long-term legs may cause abdominal discomfort, uterine stimulation contractions, resulting in premature labor. If a pregnant woman has pain and discomfort, she should seek medical attention.