1. Tecnológico Nacional de México, Celaya 38010, Mexico
2. Tecnológico Nacional de México, Departament of Electronics Engineering, Celaya 38010, Mexico
3. Tecnológico Nacional de México, Depatrment of Electronics Engineering, Morelia 58120, Mexico
4. Hospital General de Celaya “ISSSTE”, Obstetrics and Gynecology, 38020, Mexico