The baby is expelled when labour has sufficiently dilated the cervix in order to allow it to pass. The expulsion, facilitated by the uterine contractions and the voluntary abdominal contractions of the mother, lasts one half hour on average. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / QA International |
Taille de l’image : | 5197 px × 3186 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |