Atosiban is a drug with a chemical structure, similar to that of contractin, which can compete with contractin for the contractin receptor on the uterine smooth muscle cell membrane. When the contractile hormone receptor is antagonized by atosiban, the contraction of uterus induced by contractile hormone in the body can be inhibited, thus it has a good effect of anti-preterm labor and fetal preservation. The advantages of atosiban are that the side effects are very mild, there are no clear contraindications, and the anti-preterm labor preservation effect is very good, and it can be used in patients with preterm labor preservation without definite intrauterine infection. The disadvantage of atosiban is that it is expensive, costing up to about 15,000 yuan for a course of treatment used for two days.