SMALLER PELVIS: The difficulty of the delivery is sometimes due to the size of the mother’s pelvis. Smaller pelvis can lead to a longer and more difficult delivery. A long labour with a lot of pushing can cause this condition making it difficult for the baby’s head to travel through the birth canal. EARLY RUPTURE OF AMNIOTIC SAC: In some cases, if the membrane ruptures early or if there is too little fluid in the sac, the mother’s pelvic bones will put pressure on the infant’s head. The longer there’s fluid around the infant, lower the chances of scalp swelling. USE OF VACUUM SUCTION OR FORCEPS: There is a greater chance that the baby will have caput succedaneum. These methods will not result in any long term injury but they may put a little more pressure on the baby’s head.