Why can’t I use TENS before 37 weeks into my pregnancy?

The risks to unborn babies and to foetal development when using TENS before 37 weeks into pregnancy are unknown, therefore we do not recommend the use of a TENS machine before you reach this stage of pregnancy.

After 37 weeks into your pregnancy, you can safely use TENS to help provide relief from backache, and for a drug-free alternative form of pain relief during your labour.

We highly recommend:

• Do NOT use during the first three months of pregnancy. It is not known whether TENS may affect foetal development.
• Do NOT use on the abdomen in the later stages of pregnancy. Stop using immediately if you experience unexpected contractions.

Please see the ACPWH guidance for more information.