Correlation of fetal rectal ampulla abdominal diameter with gestational age and establishment of reference values in low⁃risk fetuses at 18 ~ 40 weeks of pregnancy
Yuqi ZHANG,Kesong ZHOU,Shiquan ZHANG,Lei TANG,Enxiu XIE,Hongquan LIAO,Tao. YANG
The Journal of Practical Medicine . 2025, (6): 882 -888 .  DOI: 10.3969/j.issn.1006-5725.2025.06.017