This monitors fetal heart rate and movement to be sure that the baby is getting enough oxygen and that the nervous system is responding. (kidshealth.org)
If you are not feeling movement under those guidelines, your doctor may ask you to come in for fetal heart monitoring to make sure that your baby is okay. (verywellfamily.com)
They include the absence of fetal heart tones on an ultrasound, vaginal discharge that turns from brown to bright red, and a reduction of pregnancy symptoms. (checkpregnancy.com)