Many new mothers worry about their milk supply. For some, support from a breastfeeding counsellor or lactation consultant helps.

Others cannot make enough milk no matter how hard they try. These are women whose breasts are not physically capable of producing enough milk.

Our recently published research gives us clues about breast features that might make it difficult for some women to produce enough milk. Another of our studies shows the devastating consequences for women who dream of breastfeeding but find they cannot.

Some breasts just don’t develop

Unlike other organs, breasts are not fully developed at birth. There are key developmental stages as an embryo, then again during puberty and pregnancy.

At birth, the breast consists of a simple network of ducts. Usually during puberty, the glandular (milk-making) tissue part of the breast begins to develop and the ductal network expands. Then typically, further growth of the ductal network and glandular tissue during pregnancy prepares the breast for lactation.

But our online survey of women who report low milk supply gives us clues to anomalies in how some women’s breasts develop.

We’re not talking about women with small breasts, but women whose glandular tissue (shown in this diagram as “lobules”) is underdeveloped and have a condition called breast hypoplasia.

We don’t know how common this is. But it has been linked with lower rates of exclusive breastfeeding.

We also don’t know what causes it, with much of the research conducted in animals and not humans.

However, certain health conditions have been associated with it, including polycystic ovary syndrome and other endocrine (hormonal) conditions. A high body-mass index around the time of puberty may be another indicator.

Could I have breast hypoplasia?

Our survey and other research give clues about who may have breast hypoplasia.

But it’s important to note these characteristics are indicators and do not mean women exhibiting them will definitely be unable to exclusively breastfeed.

Indicators include:

• a wider than usual gap between the breasts
• tubular-shaped (rather than round) breasts
• asymmetric breasts (where the breasts are different sizes or shapes)
• lack of breast growth in pregnancy
• a delay in or absence of breast fullness in the days after giving birth

In our survey, 72% of women with low milk supply had breasts that did not change appearance during pregnancy, and about 70% reported at least one irregular-shaped breast.

The effects

Mothers with low milk supply – whether or not they have breast hyoplasia or some other condition that limits their ability to produce enough milk – report a range of emotions.

Research, including our own, shows this ranges from frustration, confusion and surprise to intense or profound feelings of failure, guilt, grief and despair.

Some mothers describe “breastfeeding grief” – a prolonged sense of loss or failure, due to being unable to connect with and nourish their baby through breastfeeding in the way they had hoped.

These feelings of failure, guilt, grief and despair can trigger symptoms of anxiety and depression for some women.

One woman told us:

[I became] so angry and upset with my body for not being able to produce enough milk.

Many women’s emotions intensified when they discovered that despite all their hard work, they were still unable to breastfeed their babies as planned. A few women described reaching their “breaking point”, and their experience felt “like death”, “the worst day of [my] life” or “hell”.

One participant told us:

I finally learned that ‘all women make enough milk’ was a lie. No amount of education or determination would make my breasts work. I felt deceived and let down by all my medical providers. How dare they have no answers for me when I desperately just wanted to feed my child naturally.

Others told us how they learned to accept their situation. Some women said they were relieved their infant was “finally satisfied” when they began supplementing with formula. One resolved to:

prioritise time with [my] baby over pumping for such little amounts.

Where to go for help

If you are struggling with low milk supply, it can help to see a lactation consultant for support and to determine the possible cause.

This will involve helping you try different strategies, such as optimising positioning and attachment during breastfeeding, or breastfeeding/expressing more frequently. You may need to consider taking a medication, such as domperidone, to see if your supply increases.

If these strategies do not help, there may be an underlying reason why you can’t make enough milk, such as insufficient glandular tissue (a confirmed inability to make a full supply due to breast hypoplasia).

Even if you have breast hypoplasia, you can still breastfeed by giving your baby extra milk (donor milk or formula) via a bottle or using a supplementer (which involves delivering milk at the breast via a tube linked to a bottle).

More resources

The following websites offer further information and support:

• Australian Breastfeeding Association
• Lactation Consultants of Australia and New Zealand
• Royal Women’s Hospital, Melbourne
• Supply Line Breastfeeders Support Group of Australia Facebook support group
• IGT And Low Milk Supply Support Group Facebook support group
• Breastfeeding Medicine Network Australia/New Zealand
• Supporting breastfeeding grief (a collection of resources).

Shannon Bennetts, a research fellow at La Trobe University, contributed to this article.

Renee Kam, PhD candidate and research officer, La Trobe University and Lisa Amir, Professor in Breastfeeding Research, La Trobe University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Exercising before bed has long been discouraged as the body doesn’t have time to wind down before the lights go out.

But new research has found breaking up a quiet, sedentary evening of watching television with short bursts of resistance exercise can lead to longer periods of sleep.

Adults spend almost one third of the 24-hour day sleeping. But the quality and length of sleep can affect long-term health. Sleeping too little or waking often in the night is associated with an increased risk of heart disease and diabetes.

Physical activity during the day can help improve sleep. However, current recommendations discourage intense exercise before going to bed as it can increase a person’s heart rate and core temperature, which can ultimately disrupt sleep.

Nighttime habits

For many, the longest period of uninterrupted sitting happens at home in the evening. People also usually consume their largest meal during this time (or snack throughout the evening).

Insulin (the hormone that helps to remove sugar from the blood stream) tends to be at a lower level in the evening than in the morning.

Together these factors promote elevated blood sugar levels, which over the long term can be bad for a person’s health.

Our previous research found interrupting evening sitting every 30 minutes with three minutes of resistance exercise reduces the amount of sugar in the bloodstream after eating a meal.

But because sleep guidelines currently discourage exercising in the hours before going to sleep, we wanted to know if frequently performing these short bursts of light activity in the evening would affect sleep.

Activity breaks for better sleep

In our latest research, we asked 30 adults to complete two sessions based in a laboratory.

During one session the adults sat continuously for a four-hour period while watching streaming services. During the other session, they interrupted sitting by performing three minutes of body-weight resistance exercises (squats, calf raises and hip extensions) every 30 minutes.

After these sessions, participants went home to their normal life routines. Their sleep that evening was measured using a wrist monitor.

Our research found the quality of sleep (measured by how many times they woke in the night and the length of these awakenings) was the same after the two sessions. But the night after the participants did the exercise “activity breaks” they slept for almost 30 minutes longer.

Identifying the biological reasons for the extended sleep in our study requires further research.

But regardless of the reason, if activity breaks can extend sleep duration, then getting up and moving at regular intervals in the evening is likely to have clear health benefits.

Time to revisit guidelines

These results add to earlier work suggesting current sleep guidelines, which discourage evening exercise before bed, may need to be reviewed.

As the activity breaks were performed in a highly controlled laboratory environment, future research should explore how activity breaks performed in real life affect peoples sleep.

We selected simple, body-weight exercises to use in this study as they don’t require people to interrupt the show they may be watching, and don’t require a large space or equipment.

If people wanted to incorporate activity breaks in their own evening routines, they could probably get the same benefit from other types of exercise. For example, marching on the spot, walking up and down stairs, or even dancing in the living room.

The key is to frequently interrupt evening sitting time, with a little bit of whole-body movement at regular intervals.

In the long run, performing activity breaks may improve health by improving sleep and post-meal blood sugar levels. The most important thing is to get up frequently and move the body, in a way the works best for a person’s individual household.

Jennifer Gale, PhD candidate, Department of Human Nutrition, University of Otago and Meredith Peddie, Senior Lecturer, Department of Human Nutrition, University of Otago

This article is republished from The Conversation under a Creative Commons license. Read the original article.