How long can breast milk be stored?
1. Studies show that at temperatures between 19°C and 26°C, bacteria do not multiply in breast milk for 2 to 4 hours. However, after 6 hours, bacterial growth accelerates.
2. Lysozyme in breast milk breaks down bacterial mucopolysaccharide complexes; secretory immunoglobulin A in breast milk causes microorganisms to agglutinate.However, at room temperature, these lysozyme and immunoglobulins undergo molecular structural changes over time, gradually losing their ability to inhibit bacterial growth.
Therefore, expressed breast milk should not be stored at room temperature for more than 6 hours.
3. Expressed milk should be stored in sterilized containers, cooled with cold water, and finally refrigerated. It can be refrigerated for up to 3 days.
4. Each expressed milk batch should be stored in a separate container. Do not mix batches. If multiple containers are used, clearly label each with the date of expression.
5. For storage, prioritize well-sealed plastic containers over glass containers. Avoid metal containers whenever possible, as active factors in breast milk may adhere to glass or metal surfaces, thereby reducing the milk's nutritional value.
Breast Milk Storage Duration and Methods
Step 1: Prepare Equipment
Gather a breast pump and storage containers. Opt for freezer-safe, airtight plastic containers like breast milk storage bags. Glass containers are a secondary option. Avoid metal containers, as active factors in breast milk may adhere to glass or metal surfaces, reducing its nutritional value.
Step 2: Expressing Milk
Mothers can express and store milk before work, labeling containers with the date and time to prevent digestive issues from expired milk.
Even when busy, mothers should express milk every 3 hours to prevent engorgement and decreased milk supply, ensuring breastfeeding continues smoothly. Expressed milk can be stored, preventing babies from missing out on breast milk.
If your workplace lacks refrigeration, consider bringing a mini-fridge for temporary storage. Upon returning home, feed the milk to your baby promptly or transfer it to the refrigerator.
Step 3: Storage
Leave some space in containers when storing breast milk. Avoid filling them completely or sealing lids too tightly to prevent containers from bursting due to freezing expansion. It's best to portion milk into small servings of 60–120ml for freezing or refrigeration. This allows family members or caregivers to feed the baby according to their appetite, minimizing waste. Label each container with the date.
Feeding Benefits
1. Benefits of Breastfeeding for Offspring
I. Breastfeeding Promotes Infant Health and Growth
Breast milk, especially colostrum, contains abundant nutrients essential for infants. It is a superior milk source that cannot be replaced by any dairy product. Sucking on breast milk is highly beneficial for an infant's healthy growth, offering countless advantages with no known drawbacks.
II. Breastfeeding Strengthens Infant Resistance and Immunity
Breast milk, especially colostrum, contains abundant antibiotics essential for infants, helping fight infections. Thus, breastfeeding enhances an infant's resistance and immunity, reducing or preventing illness.
III. Breastfeeding aids infant digestion and healthy development
With its multifaceted advantages, balanced nutrition, and optimal composition—qualities lacking or incomplete in other foods—breastfeeding supports infant digestion and promotes healthy growth and development.
IV. Breastfeeding Strengthens the Mother-Infant Bond
As the saying goes, a mother and child share a heart. The stimulation from the infant suckling the nipple deepens a new mother's affection, care, and tenderness toward her baby. Through breastfeeding, the infant experiences the warmth and closeness of skin-to-skin contact with the mother, feeling both secure and joyful.
Thus, the bond between mother and child is constantly nurtured and deepened through this intimate connection.
V. Breastfeeding is Economically Advantageous
Breast milk not only supports the infant's healthy growth and aids the new mother's physical recovery but is also more cost-effective than other feeding options.
VI. Breastfeeding is Convenient and Quick
The benefits of breastfeeding are truly manifold. Not only is it economical, but it is also convenient and quick—truly available whenever needed. This makes it highly suitable for infants' frequent, small-meal feeding requirements. Unlike adults who eat at set times and quantities, infants demand feeding whenever they cry, and delay often leads to persistent fussiness and irregularity.
Other feeding methods struggle to meet these demands, making breastfeeding uniquely adaptable and satisfying.
VII. Breast Milk is Clean and Safe
Breast milk is unquestionably the optimal infant food. Safe, clean, non-toxic, and free of side effects, it serves as nature's innate "safe granary" for newborns.
VIII. Breastfeeding Reduces Infant Allergies
Because breast milk is clean, safe, non-toxic, and free of side effects—while containing natural antibiotics and antiviral agents—breastfeeding significantly lowers the incidence of various infant allergies.Using alternative feeding methods often leads to diverse allergic reactions, causing babies to lose their appetite, experience restless sleep, and suffer discomfort, all of which hinder healthy growth.