“Cervicovaginal Fluid Beta Human Chorionic Gonadotropin Assay As an Early Predictor of Spontaneous Preterm Delivery Among Antenatal Patients”. The Nigerian Health Journal 21, no. 2 (July 25, 2021): 45–59. Accessed March 12, 2025. https://tnhjph.com/index.php/tnhj/article/view/523.