A ventouse birth is when a particular type of instrument needs to be used in order for the birth to take place. The ventouse is a type of vacuum extractor which utilises suction. The ventouse will attach a cup to the head of your baby. Then your midwife or obstetrician will wait until your next contraction, at which stage she or he will ask you to push as she or he pulls gently in order to deliver your baby. Frequently it is necessary to pull more than once.