When an infant or
toddler has not yet attained milestones that have been met by 90% of typically-developing infants his age, he has a significant delay.
Babies attain objects with an ulnar-palmar grasp at 4 mos. By 7 mos. they have a "scissors grasp", At 9-10 mos. they start using a pincer grasp, refined by 12 mos. At 10 mos. they release a raisin into a bottle. Self-help skills are impacted by a fine motor delay.