Fetal monitors are of the utmost importance in keeping track of an unborn child’s heart rate and respiration. Monitoring these vital signs helps ensure the health of the fetus, so you want to use monitors that are versatile and reliable. Bionet and Summit Doppler are two top brands offering devices that let you monitor twins or singles. Top-of-the-line technology such as oximetry probes, toco and ultrasound sensors as well as ECG cables make these machines perfect for many medical settings.