Tumanova, L., and O. Kolomiiets. “The Anterior Uterocervical Angle As a New Ultrasound Marker of Preterm Labor in Pregnant Women With a History of Endocrine and Combined Infertility”. REPRODUCTIVE ENDOCRINOLOGY, no. 60, Sept. 2021, pp. 34-38, doi:10.18370/2309-4117.2021.60.34-38.