Kate Middleton is reportedly using this birthing method for third baby

With the arrival of Kate Middleton and Prince William's third baby getting closer, the Duchess is busy creating her birth plan.

As she's known for having difficult pregnancies - the 36-year-old suffers from severe morning sickness called Hyperemesis Gravidarum - Kate will reportedly undergo a new birthing technique this time around.

According to The Sunday Times, Kate will use Hypnobirthing when she gives birth in April.

Hypnobirthing is an increasingly popular natural birthing experience that combines self-hypnosis, relaxation and breathing techniques to minimise pain.

It's been praised by celebrities in the past, including supermodel Gisele Bundchen and actress Jessica Alba.

According to the publication, the midwives at St. Mary’s hospital are now being trained in the new technique.

Reports say 22 midwives will undergo an intensive two-day training in February in preparation for the royal birth.

The founder of the Hypnobirthing Association, Katharine Graves, says Hypnobirthing can help pregnant women release tensions that can cause extreme pain, which will prolong their labour hours.

The baby will be the couple's third child, after welcoming Prince George in July of 2013 and Princess Charlotte in May of 2015.