When labour begins, your midwife or birth partner will attach four self-adhesive electrode pads on your back, two below the bra line and two on your lower back. TENS transmits electrical impulses through your skin via these pads.

These gentle impulses attack pain in two ways: by stimulating the release of endorphins, the body’s own pain-relieving hormones; and by stimulating the nerves in the spine to block the pain signals before they reach the brain.

Positive effects can be felt immediately.

18 year old Hannah Flather has a high pain threshold, or so she thought! That was until her periods began at the age of 14.

Nothing helped with the pain, until a school nurse suggested trying the Ova.