At-the-Breast vs. Expressed Human Milk: Genesis of Infant Nutrition (BEGIN)

Inclusion Criteria

• •Lactating mothers between 20-40 years old at enrollment
• •o 120 mother/infant dyads who primarily feed HM ATB (average \>75% of feeds,
• •pumping no more than one time per day)
• •o 120 mother/infant dyads who predominantly feed expressed HM (average \>75% of feeds)
• •All races and ethnicities may enroll
• •Singleton infant delivered after 37 weeks
• •Infant between the ages of 0-1 months at the time of enrollment.
• •No serious health complications in mother or infant