To emit voluntarily sounds mastered during the childbirth is a practice found in certain cultures of country of Africa or Muslim or gypsy traditions. Today, because of the medical coverage and because of the childbirth in a hospital environment, this tradition is not anymore transmitted.

The emission of a sound vibration conjugated to a positive intention managed during the childbirth was experimented with around thirty mothers. In the term of this pilot study, most of the women expressed one felt very positive towards the new method, in particular when they compared it with a previous childbirth where this method was not used.

During these childbirths, the midwives also indicated a shortening of the working time.

The present study aim essentially is to confirm the positive effect of the method on the felt of the childbirth.

Inclusion Criteria:

• Women of more than 18 years old
• Primipara
• Patients joining the antenatal classes dispensed by the midwives.
• Patients affiliated to a national insurance scheme or benefiting from such a diet
• Patients having given a written consent form

Exclusion Criteria:

• None