@misc{indiciaea4f408d17690, title = {Reference data representative of normal findings at two-dimensional and three-dimensional gray-scale ultrasound examination of the cervix from 17 to 41 weeks' gestation.}, author = {L Rovas and P Sladkevicius and E Strobel and L Valentin}, year = {2006}, doi = {10.1002/uog.2658}, url = {https://pubmed.ncbi.nlm.nih.gov/16388513/}, note = {Source identifier: 16388513} }