Preterm Birth Analysis Using Nonlinear Methods (a preliminary study)
  In this report we review modern nonlinearity methods that can be used in the preterm birth analysis. The nonlinear analysis of uterine contraction signals can provide information regarding physiological changes during the menstrual cycle and pregnancy. This information can be used both for the preterm birth prediction and the preterm labor control.   Keywords: preterm birth, complex data analysis, nonlinear methods 
Tijana T. Ivancevic, Lakhmi C. Jain, John Pattison and Alex Hariz