Fetal electroencephalography, also known as prenatal<unk>  includes any recording of electrical fluctuations arising from the brain of a fetus. Doctors and scientists use<unk> s to detect and characterize brain activity, such as sleep states, potential seizures, or levels of a coma.<unk>  captures the electrical activity in the vicinity of the recording electrodes. The majority of the neural electrical activity arises from the flow of current from the cell bodies of pyramidal neurons to their apical dendrites, which become depolarized by excitatory inputs from other neurons. To record the most accurate signals, scientists try to minimize the distance between the recording electrode and the neural activity that they want to detect. Given the difficulty of attaching electrodes to a fetus inside a uterus, doctors and scientists use a variety of techniques to record fetal brain activity. The three most common techniques for recording electrical brain activity before birth include: * Attaching electrodes directly onto the fetus' scalp during surgical removal of the fetus * Attaching electrodes on the maternal abdomen or cervix to record activity from the fetus in the third trimester * Attaching electrodes to the scalp of an infant during labor and delivery. The recording of the youngest fetus was performed between 43 and 45 days gestation and revealed some<unk>  features observed in newborns.
Fetal EEG
Doppler fetal monitor
Fetal scalp stimulation test
Fetal echocardiography
Fetal scalp blood testing
Amniocentesis
Amniotic fluid index
Percutaneous umbilical cord blood sampling