Understanding the Link: Does what you eat determine how big your baby is?
                                
                                
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                                    3 min read                                
                            
                                Research indicates that genetics play a significant role in determining a baby's size, but maternal nutrition can be a powerful modifying factor. This means that a pregnant person's diet, along with other health factors, can influence whether a baby's weight falls on the higher or lower end of the genetic spectrum. So, **does what you eat determine how big your baby is?** The answer is that it's a critical, but not exclusive, piece of the puzzle.