@article{oai:shiga-med.repo.nii.ac.jp:00003720,
 author = {桂, 大輔 and 辻, 俊一郎 and 林, 香里 and 所, 伸介 and 山田, 一貴 and 鈴木, 幸之助 and 木村, 文則 and 村上, 節 and KATSURA, Daisuke and TSUJI, Shunichiro and HAYASHI, Kaori and TOKORO, Shinsuke and YAMADA, Kazutaka and SUZUKI, Kounosuke and KIMURA, Fuminori and MURAKAMI, Takashi},
 journal = {Journal of obstetrics and gynaecology : the journal of the Institute of Obstetrics and Gynaecology},
 month = {Oct},
 note = {We analysed the effectiveness of transvaginal ultrasonographic and foetal/maternal pulse Doppler findings as predictors of labour onset within 1 week. We included 22 single normal pregnancies and evaluated the one-point and short- and long-term differences in uterine artery pulsatility index (PI), umbilical artery PI, middle cerebral artery PI (MCA-PI), peak systolic velocity, and cervical length (CL). Presence of funnelling and membrane separation over the internal cervical os was evaluated. Significant changes were observed in the one-point measurement of and short-term and long-term differences in CL, the one-point measurement of and long-term difference in MCA-PI, and the presence of membrane separation (Grade 2). In multivariate analysis, the significant predictors were short-term differences in CL (odds ratio [OR]: 5.27), long-term differences in MCA-PI (OR: 13.3), and presence of membrane separation (Grade 2) (OR: 5.38). Transvaginal ultrasonographic and foetal pulse Doppler findings were effective predictors of labour onset within 1 week., Impact statement, What is already known on this subject? 
Parameters reported to predict labour onset include the Bishop score, cervical length, decreased long-term cervical length, funnelling of the internal cervical os, and adrenal gland volume., What do the results of this study add?
Short-term changes in cervical length, long-term changes in middle cerebral artery pulsatility index, and the presence of membrane separation Grade 2 were found to be useful predictive factors of labour onset in this study., What are the implications of these findings for clinical practice and/or further research? 
The prediction of labour onset enables clinicians to properly manage pregnancy and delivery considering maternal and foetal conditions., Journal Article},
 pages = {1--6},
 title = {Predictive factors of labour onset using ultrasonography.},
 year = {2020}
}