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How and when to express breast milk

Everything you need to know about pumping and storing your precious breast milk so that baby can still have the very best while you enjoy a little freedom.

In Newborn

    5-minutes read

    At a glance

    Try to relax when you’re expressing. The calmer you are, the easier your milk will flow
     

    You can store breast milk for up to six months in a proper freezer 

     

    Expressing milk shouldn’t be painful. If you’re experiencing regular pain speak to your health visitor

    Some mums find it hard to get the hang of expressing. Check for support in your area 

    Breast milk is the best super food for babies and it’s one of the most wonderful things you can give them. Having the option to express breast milk can be a huge help when you can’t be there to breastfeed baby yourself. You might be apart from baby due to work, a partner might want to help with feeding, or maybe you just want a night out with friends. Whatever the reason, expressing means your baby still gets all the benefits of breast milk, even if you’re not around. It’s baby’s very own super-nutritious takeaway.

    Expressing milk can also be helpful if you want to boost your milk supply. In fact, if you express milk to make extra in the early days, it can be easier to produce more milk later.

    Here’s how to express your milk

    If you don’t need to express milk from the beginning, it may be best to wait until breastfeeding is well established – the NHS recommends waiting until you and baby both feel happy with it.

    You can express milk by:

    • Using your hand
    • Using a manual express pump
    • Using an electric express pump

    Whether you’re expressing by hand or using a pump, always wash your hands before you start and sterilise any equipment.

    It’s helpful to get in the right mood too: the more relaxed you are, the easier it will be. Morning can be a good time as your breasts are often at their fullest, but this varies depending on mum. When you’re feeling happy and relaxed the hormone oxytocin starts flowing in your body which causes your milk to be released or, ‘let down’. A warm shower before a feed will help milk flow by increasing the blood supply to your breast. To stimulate your hormones into starting their work try holding your baby or sitting near them. Even just looking at their picture, or holding and smelling their clothes can help get things going. One more thing, have a drink to hand because baby won’t be the only one who’ll get thirsty.

    Expressing by hand

    You’ll need a wide-mouthed container, such as a jug, to collect your milk in. Make sure it’s cleaned and scalded with boiling water or sterilised. You’ll also need some sterile bags, bottles or lidded containers to store the milk in.

    Hand expressing does take a bit of getting used to, and you may need to practise for a while. These tips might help:

    1. Make sure your hands are clean and you’re feeling comfortable and relaxed.
    2. Cup your breast with one hand. With your other hand, make a "C" shape with your fingers and thumb.
    3. Gently massage or squeeze this area between your thumb and forefinger around your nipple. But not the nipple itself.
    4. Release the pressure and then repeat until you get a good rhythm going but don’t slide your finger over the skin.
    5. As the milk flows, express it into a bottle or breast milk freezer bag or any sterilised container.
    6. If your milk doesn’t flow, try moving your finger and thumb closer to the nipple or further away until it does.
    7. Practice makes perfect. If you ever need help contact your midwife or breastfeeding adviser
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    Using a pump to express

    Some mums find it easier to use an express pump. Whether you use a manual or an electric express pump will depend on what you’re comfortable with, how often you need to express, and how much milk you need to produce. Some electric express pumps allow you to express both breasts at the same time.

    Most express pumps work in a similar way. You put a suction cup and funnel attachment over your nipple and areola. This mimics how your baby suckles and stimulates your milk flow. If you’re using a manual express pump you repeatedly squeeze a handle to create the pumping action. With an electric pump, the machine does the squeezing for you.

    If you only need to express the odd feed, expressing by hand or using a cheaper manual pump may work best. If you’ll be pumping regularly at home or work, a standard electric pump might be a better bet.

    If you need to produce lots of milk because your baby can’t feed from your breast, there are hospital-grade double electric express pumps which you can hire for use at home.

    Your guide to breast pumping

    • Sit comfortably, with your back straight.
    • Support your breast from underneath. Place your fingers flat on your ribs, with your first finger between your breast and ribs.
    • Ease your nipple into the funnel, making sure it’s in the centre. The funnel needs to be the right size: too big and it can make your nipples sore, too small and it can block your milk flow.
    • The funnel needs to be flush against your skin to maintain a seal but don’t force this.
    • Be patient. It often takes a minute or two for your milk to flow well.
    • It can take 15 - 45 minutes to pump both your breasts. The main thing is to pump for as long as your milk is flowing well.
    • Change breasts when the flow slows down. Keep changing between breasts because even if you’re only getting a small amount out, it all adds up.
    • Some electric express pumps have adjustable levels of suction. Start low and build up slowly. Starting high can be painful and may damage your nipples.
    • Expressing shouldn’t be painful, but if you’re experiencing any pain, or you’re finding it difficult, speak to your midwife.

    How long can you store breast milk?

    Here are some basic guidelines for storing breast milk:

    • At 4°C or under, you can keep it in the fridge for up to five days, Just make sure to put the date on the container.
    • You can store it in the freezer box for up to two weeks.
    • At -18°C or lower, you can keep frozen breast milk for up to six months.

    How to defrost breast milk

    • Thaw the frozen breast milk in the fridge and use within 12 hours of thawing.
    • To speed things up, stand the container in tepid water and use the milk immediately after thawing.
    • Make sure it is completely thawed and check the temperature before feeding.
    • Don’t microwave your breast milk: it can cause hot spots that could scald your baby.
    • To reheat expressed milk, stand a bottle in warm water until the milk reaches the desired temperature.
    • Never refreeze breast milk, throw away any leftovers.

    IMPORTANT NOTICE: The best way to feed a baby is to breastfeed, as breast milk provides the ideal balanced diet and protection against illness for your baby and also many non-nutritional benefits for both baby and mother. We recommend that you speak to your healthcare professional when deciding on your choice of feeding your baby. Professional guidance should also be sought on the preparation for and maintenance of breastfeeding. If you do choose to breastfeed, it's important to eat a healthy, balanced diet. Infant formula is intended to replace breast milk when mothers choose not to breastfeed or if for some reason they are unable to do so. A decision not to breastfeed, or to introduce partial bottle-feeding, will reduce the supply of breast milk. If for any reason you choose not to breastfeed, do remember that such a decision can be difficult to reverse. Using infant formula also has social and financial implications which must be considered. Infant formula should always be prepared, used and stored as instructed on the label, in order to avoid risks to a baby’s health.

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    Important advice to mothers

    The World Health Organisation (WHO) recommends exclusive breastfeeding for the first 6 months of life. SMA® Nutrition fully supports this and continued breastfeeding, along with the introduction of complementary foods as advised by your healthcare professional.