Preterm birth is defined as a birth that occurs after 20 weeks of gestation and before 37 completed weeks, associated with a high risk of neonatal morbidity and mortality, however, it is a problem for public health worldwide, since It carries short-term and long-term neonatal complications. It accounts for approximately 70% of perinatal mortality and 75% of morbidity, and its incidence can range from 5% in some European countries to 18% in some African countries. Spontaneous onset of preterm labor can be due to multiple causes, including cervical incompetence as a reason for preterm labor or even early pregnancy loss. The latter is the inability of the cervix to maintain its structure and function to maintain pregnancy. The clinical management of this cervical dysfunction is based on the restriction of the mother's activity, the administration of progesterone, the successive measurements...