By developmental growth spurts, I'm assuming you are referring to leaps (or also known as Wonder Weeks). Leaps are related to brain development while growth spurts are periods of physical growth and weight gain. A baby may become fussier and clingy during both periods. Baby will likely cry more and needs to be cuddle more. Growth spurts typically happen at set intervals and the physical changes may be quite notable. Some major Growth spurts can generally be expected between one and three weeks, between six and eight weeks, at three months, at six months and at nine months. However, there are more growth spurts than this. During both a leap and a growth spurt, a mother can expect her baby to feed more. There may also be sleep problems.