Spontaneous partial chorioamniotic membrane separation followed by the formation of amniotic bands:a case report

Background Chorioamniotic membrane separation (CMS) is associated with various adverse pregnancy outcomes, including miscarriage, preterm labor, stillbirth, amniotic band syndrome, etc. Spontaneous CMS is extremely rare. At present, there is no standardized monitoring and treatment protocols for CMS. Case Presentation We present an unusual case of spontaneous partial CMS with amniotic band diagnosed through ultrasonography at 27 ⁺⁶ weeks of gestation in a 34-year-old woman. About one month later, an emergency cesarean section was performed because of unavoidable preterm labor and fetal transverse presentation, resulting in the successful delivery of a healthy baby. The partial CMS with amniotic band was confirmed by the examination for the placenta. The infant underwent a 10-month follow-up period and currently is in good health despite experiencing two respiratory infections. Conclusions Based on our experience and combined with previous research, we think that etiological screening is the primary priority for CMS cases. Expectant management under close ultrasonographic scans and prolonging gestational age as much as possible may be beneficial for neonatal prognosis.