29 weeks due to physiological causes of frequent contractions at night, do not need to deal with; preterm labor caused by the need for bed rest, medication to protect the fetus treatment. 1. Physiological reasons: the uterine sensitivity increases after pregnancy, there will be irregular painless contractions, and with the increase in weeks of pregnancy and increase, so 29 weeks of pregnancy at night frequent contractions, but not accompanied by pain and cervical dilatation, the contraction duration <30 seconds, is a physiological phenomenon, does not require special treatment, can be temporarily observed. 2. Preterm labor with precursor: it will cause regular or irregular contractions with pain, often accompanied by shortening of the cervical canal, ultrasound examination of the normal development of the fetus, the cervical canal can be shortened, combined with the clinical manifestations and ultrasound examination can assist in the diagnosis. It is necessary to follow the doctor’s advice to rest appropriately, and give ritodrine and other drugs to inhibit contractions to protect the fetus. When the contractions are frequent at night in the 29th week of pregnancy, it is necessary to go to the hospital to find out the cause and deal with it promptly.