Investigation of TVNS Administration on Postpartum Mental Health

Two groups will use a tVNS stimulator for 12 weeks. Group 1 will apply active stimulation for up to 4 hours daily at a comfortable level for 6 weeks, while Group 2 will use it at the lowest intensity (0.1 mA). After 6 weeks (T2), the groups will switch. Participants will be instructed to use the device for at least 1 hour a day, with a recommendation of 4 hours, following guidelines and recent studies. The CE-certified tVNS® E device non-invasively stimulates the vagus nerve via the ear. It is approved for treating a.o.depression. Device parameters (intensity, pulse length, frequency) mimic invasive VNS techniques, ensuring safe and effective signal transmission. Stimulation will be applied to the left ear, with intensity adjusted to a tingling sensation, avoiding discomfort. The study follows an approved protocol, with low-intensity stimulation as a control. The device delivers biphasic impulses at 25 Hz, with 28 seconds ON and 32 seconds OFF, and is safe for extended use.