Early prenatal education, or prenatal education, is not very effective, because when the baby is in the belly, he has no complete hearing organs and no real memory. He won't have a lifelong memory until he is 4-5 years old, or after he is 30 years old, so I think it is no problem for you to simply teach him some life skills and the most basic etiquette before he is three years old. If you give an education too early, he can't remember it at all, and his memory is still there.
Whether a child is smart or not is related to his parents' genes and acquired education. Prenatal education is just people trying to change children's genes through such activities, so that children will be smarter after development, but this has no good effect, because the intelligence level of children born without acquired education depends largely on the variation caused by parents' intelligence level and gene combination, so prenatal education has no good effect. If you really want to educate your child, wait for the child to go to kindergarten, and then parents will accompany him appropriately, popularize some knowledge that the child needs to know in time, and leave some exercises for him to accompany the child to grow up. This is the most effective.
Usually, you can sign up for some cram schools or interest classes for your children according to their hobbies. He will be more motivated to learn what he is interested in and the effect will be better. Compulsory learning of certain knowledge will be inefficient for children, and children are unwilling to do it, so education should obey their wishes.