A systematic review of automated pre-processing, feature extraction and classification of cardiotocography. - Shahad Al-yousif; Ariep Jaenul; Wisam Al-Dayyeni; Abdullah Hussein Alamoodi; Ihab Jabori; Nooritawati Md Tahir; Ali Amer Ahmed Alrawi; Zafer Cömert; Nael A. Al-shareefi; Abbadullah H. Saleh (PeerJ Comput. Sci., 2021)