1. Pay attention to rest, overwork and frequent contractions, which may all lead to premature delivery.
2. Don't overstimulate the uterus, don't let people or things hit your stomach, and stop having sex before labor.
3. If you often have a hard stomach, you can do fetal heart monitoring, observe whether there are irregular contractions and treat them properly.
If the stomach is hard in the third trimester accompanied by stomachache and low back pain, you should go to the hospital immediately.