Beyond maintaining a healthy diet pre-birth, research shows that exclusively nursing your baby may be associated with higher IQ scores in young girls. However, this is not always easy to do. Some people are not able to nurse their babies due to financial, social, or medical reasons.
Talking with your baby may help improve their verbal abilities and cognitive skills in adolescence. However, it's important to keep in mind that a child's intelligence can be influenced by a variety of genetic and environmental factors such as:
parental IQ
genes
home life
parenting style
nutrition
education
Birth weight may also play a role in a child's intelligence.
Moreover, measurable intelligence like IQ by itself does not determine the value of a person or whether they will succeed in life. Many other environmental factors can play a role. Therefore, the best way to set a baby up for a healthy life is to provide them with safety and love, which in turn will give the child the best opportunities in the future.