Spanking remains a long-time topic of debate as many parents in the US spank their children, researchers said.
However, previous research has focused on disciplining children as young as age 3, in part, because spanking is common among children of this age.
Studies have shown that spanking is related to children's greater aggression, depression and other negative behaviour.
But the latest findings show that spanking is used on children who are so young that, in some cases, they haven't even taken their first step, researchers said.
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The study indicated that spanking by the child's mother, father or mother's current partner when the child was a year old was linked to child protective services' involvement between ages 1 and 5.
During that time, 10 per cent of the families received at least one visit by CPS.
U-M social work professors Shawna Lee and Andrew Grogan-Kaylor said that spanking babies is particularly misguided and potentially harmful, and may set off a cascade of inappropriate parental behaviour.
The research is a snapshot of a larger problem: many people lack parenting skills that include alternatives to spanking.
Perinatal well-baby clinical visits and home visitations after the child's birth are opportunities for pediatricians, nurses and social workers to talk to parents about alternatives to spanking babies and toddlers, researchers said.