Rie Oi1,2, Naoyuki Miyasaka3, Takahiro Yamashita4, Tomoko Adachi4. 1. Maternal and Child Health Center Aiiku Hospital, 1-16-10 Shibaura, Minato-ku, Tokyo, 105-0023, Japan. oirie1023@yahoo.co.jp. 2. Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan. oirie1023@yahoo.co.jp. 3. Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan. 4. Maternal and Child Health Center Aiiku Hospital, 1-16-10 Shibaura, Minato-ku, Tokyo, 105-0023, Japan.
Abstract
PURPOSE: A prospective assessment of the risk of spontaneous preterm delivery (sPTD) by evaluating temporal changes in cervical measurements. METHODS: We analyzed clinical variables, focusing on cervical length (CL) and lower uterine segment (LUS) length (LUSL) as measured by transvaginal ultrasonography in 727 pregnant Japanese women. RESULTS: In women undergoing term deliveries, CL increased from gestational week (GW) 8-25. In contrast, the combination of CL and LUSL (ComL for "combined length") gradually decreased and sole LUSL became almost 0 mm by GW 25. Univariate logistic regression analysis suggested that a history of PTD was a risk factor for sPTD. CL, LUSL, and ComL were not significant predictors of sPTD. CONCLUSION: To assess the risk of sPTD in the second trimester, it is not necessary to distinguish the cervix from the LUS.
PURPOSE: A prospective assessment of the risk of spontaneous preterm delivery (sPTD) by evaluating temporal changes in cervical measurements. METHODS: We analyzed clinical variables, focusing on cervical length (CL) and lower uterine segment (LUS) length (LUSL) as measured by transvaginal ultrasonography in 727 pregnant Japanese women. RESULTS: In women undergoing term deliveries, CL increased from gestational week (GW) 8-25. In contrast, the combination of CL and LUSL (ComL for "combined length") gradually decreased and sole LUSL became almost 0 mm by GW 25. Univariate logistic regression analysis suggested that a history of PTD was a risk factor for sPTD. CL, LUSL, and ComL were not significant predictors of sPTD. CONCLUSION: To assess the risk of sPTD in the second trimester, it is not necessary to distinguish the cervix from the LUS.
Entities:
Keywords:
Cervix uteri; Diagnostic imaging; Premature birth; Second trimester of pregnancy; Ultrasonography
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