There is no such thing as a 7-pound baby being the smartest. Whether a baby is smart or not has little to do with weight, but has more to do with genetics, medications and other factors.
1. Genetic factors: the IQ of a baby is mainly determined by the genes of the parents, so parents with high IQ, the child’s IQ is generally relatively high.
2. Drugs: If you take some drugs during pregnancy that have a greater effect on the fetus, it may affect your baby’s IQ.
3. Other factors: Diet, environment and other factors may also affect the baby’s IQ.
Whether a baby is smart or not is not determined by the weight, in fact, the specific situation of each baby is different, so there is a certain difference in IQ itself.