A very small percentage of babies suffering from Plagiocephaly are born with it. Babies can be born with Plagiocephaly due to:- lack of amniotic fluid in the womb, difficult birth, prolonged time in the birth canal, external force to the head (forceps delivery), position of the baby in utero (breech) Most babies who suffer from Plagiocephaly however are not born with the condition. Babies who develop Positional Plagiocephaly usually develop it at around 4-8 weeks of age, due to a number of factors:- They may suffer from Torticollis (tightening of the neck muscles). Babies who suffer from torticollis find it almost impossible to move their heads in both directions, therefore will almost always lie facing to the left or right (depending on which side of the neck is affected). Prolonged pressure from hard surfaces (eg: car seats, hard floor, cot mattress etc). This can mould a babies head into an abnormal shape. size is 25cm length X 20cm Width