There are differences in response time depending on the method of administration of the contractions, e.g. intramuscular injection has a response after 3-5 minutes, whereas intravenous drip has an immediate response. Intravenous drip allows the contractions to reach the body of the uterus quickly with the blood circulation and bind to the contraction receptors in the myometrium to cause contractions, so the response to intravenous drip is faster than intramuscular injection. Intramuscular injection of contractions lasts 30-60 minutes. The frequency and intensity of uterine contractions gradually stabilize within 15-60 minutes of intravenous drip, and the response gradually decreases 20 minutes after the completion of the drip, but the individual’s sensitivity to contractions may also affect the response time. In addition, pregnant women may experience mild adverse reactions to the injection of IUD, including occasional nausea, vomiting, increased heart rate or cardiac arrhythmia, and the formation of blood clots with intravenous drip, which varies according to the individual’s clinical manifestations. Therefore, the use of oxytocin must be under the guidance of a doctor to minimize the occurrence of adverse reactions, especially when oxytocin is given during induction of labor, the number of drops of the drug and the concentration of the drug must be strictly controlled in order to avoid serious consequences.