Inclusion criteria | Exclusion criteria |
---|---|
First trimester of pregnancy | Use of alcohol, cigarettes or illegal drugs |
20 to 35 years of age | Health complications |
Pre-pregnancy body mass index between 18 and 25 | Unable or unwilling to breastfeed |
No known health conditions | Excessive or insufficient weight gain (25 to 35 lbs according to pregnancy weight gain recommendations) [24] |
Use of folic acid | Non-compliance with the experimental protocol |