Editing Perinatal asphyxia (section)

==Cause==
Basically, understanding of the etiology of perinatal asphyxia provides the platform on which to build on its pathophysiology. The  general principles guiding the causes and the pathophysiology of perinatal asphyxia are grouped into antepartum causes and intra partum causes. As these are the various points to which insults can occur to the foetus. {{citation needed|date=November 2020}}

*'''Antepartum causes'''
**Inadequate oxygenation of maternal blood due to [[hypoventilation]] during anesthesia, heart diseases, [[pneumonia]], [[respiratory failure]]
**Low maternal blood pressure due to [[hypotension]] e.g. compression of vena cava and [[aorta]], excess anaesthesia.   
**Premature separation of [[placenta]]
**Placental insufficiency
*'''Intra partum causes'''
** Inadequate relaxation of uterus due to excess [[oxytocin]]
** Prolonged delivery
**Knotting of umbilical cord around the neck of infant