Timor-Tritsch I E, Warren W B, Peisner D B, Pirrone E
Department of Obstetrics and Gynecology, Columbia University College of Physicians and Surgeons, New York, NY 10032.
Am J Obstet Gynecol. 1989 Sep;161(3):831-3. doi: 10.1016/0002-9378(89)90411-0.
The application of high-frequency transvaginal sonography offers new opportunities in scanning for malformations during the first trimester of pregnancy. Scanning of the anterior abdominal wall and the umbilical cord insertion at this gestational age is feasible. A cross-sectional study of 61 embryos-fetuses from 7 to 12 weeks of gestation was performed to observe the physiologic midgut hernia. This herniation was detected in 64% of the cases at 8 weeks, in 100% during weeks 9 and 10, and in 25% at 11 weeks' gestation. None of the fetuses studied at 12 weeks had a midgut herniation. Vaginal sonography of the well-dated fetus at 12 weeks can confirm the final development of the anterior abdominal wall.
高频经阴道超声检查的应用为妊娠早期扫描胎儿畸形提供了新的机会。在此孕周对前腹壁和脐带插入点进行扫描是可行的。进行了一项横断面研究，观察61例孕7至12周胚胎-胎儿的生理性中肠疝。8周时，64%的病例检测到这种疝出，9至10周时为100%，11周妊娠时为25%。12周研究的胎儿均无中肠疝。12周准确孕周胎儿的阴道超声检查可确认前腹壁的最终发育情况。
