#asktheexpert my baby is nearly 42 days and he had little jerk while sleeping in my lap and yesterday he was crying for sleep and when I rock him for sleep he got the jerk which disturb his sleep. but when he is in cradle or cot he doesn't feel any jerk. I consult a pediatrician near our town he adviced it's normal, it may be because of calcium deficiency. after one month if it continues we can further check it. can you please give me any suggestion for this does this jerks normal