What Causes Post-Weaning Depression
The causes of post-weaning depression are incredibly complex and still poorly understood, making it a challenging topic to address fully. It involves a delicate interplay of emotional and physiological factors, each of which can vary widely from one mother to another. Whether it occurs naturally, as the child loses interest, or is prompted by external factors like low milk supply or societal pressures, this transition can evoke a range of feelings. For some mothers, especially those of older or last-born children, it may feel like the closing of an important chapter in motherhood. This shift can bring grief, nostalgia, or uncertainty about the next stage of parenting.
Emotional and Psychological Factors
Weaning isn’t just about stopping breastfeeding—it’s about stepping into a new chapter of motherhood, and that can be both beautiful and bittersweet. You’ve likely spent countless hours nursing your little one—thousands in that first year alone—giving so much of yourself, physically and emotionally. Breastfeeding may have become a big part of how you nurture, comfort, and connect with your baby. Letting go of that can feel… hard. And that’s okay.
It’s important to acknowledge that breastfeeding is no small feat. It’s demanding—those sleepless nights, the cluster feeding marathons, the moments of doubt about supply or latch. You worked through it all, because you wanted to give your baby what they needed. So, when breastfeeding comes to an end, whether you chose it or it came unexpectedly, it’s no surprise that it stirs up big emotions.
For some mothers, weaning happens gradually. You might not even realize it at first. Maybe your baby nurses less and less until one day, you notice it’s been days since the last feed. What might have been the “last time” came and went without fanfare. That can feel strange, even unsettling. For others, weaning feels more abrupt, whether it’s due to work, health reasons, or circumstances beyond your control. In those moments, it’s natural to feel a sense of loss or even anger, like something meaningful ended before you were ready. And if this is your last baby, it might hit you even harder, as though a door has closed on a part of motherhood you cherished deeply.
You might hear this referred to as “breastfeeding grief,” and it’s a very real thing. It’s not just about missing the act of nursing, it’s about the quiet moments of closeness, the way breastfeeding anchored your day, or even how it gave you a sense of purpose in those early months when everything else felt so overwhelming. But here’s the thing: whatever you’re feeling—grief, relief, a mix of both—is completely valid.
Some mothers find weaning to be a welcome relief, a chance to reclaim parts of themselves after giving so much. Others feel nostalgic for those nursing moments, even if they were tough at the time. Most feel a bit of both, and that’s perfectly normal too.
Weaning is a big adjustment for both you and your baby, emotionally and physically. It’s okay to take your time with it, to feel whatever comes up, and to lean on the people around you for support. This isn’t just the end of breastfeeding—it’s a transition into a new phase of your relationship with your child, one filled with new ways to connect, nurture, and love.
You’re doing an amazing job, and it’s okay to give yourself grace as you move through this. Motherhood is a journey, and every step, even the hard ones, helps shape the beautiful bond you share with your child.
Physiological Factors
In addition to everything happening in your mind and emotions, your body is also going through some significant changes during weaning. Physiologically, this transition triggers a cascade of hormonal shifts that can directly impact how you feel.
During breastfeeding, two key hormones, prolactin and oxytocin, play a vital role. Prolactin, the milk-production hormone, promotes feelings of calm and relaxation, while oxytocin, often called the “bonding hormone,” helps create a deep emotional connection between you and your baby. When breastfeeding stops, these hormone levels drop, which can leave you feeling unsettled, disconnected, or unexpectedly low.
But there’s more to it than just prolactin and oxytocin. As your estrogen and progesterone levels rise, returning to pre-pregnancy levels, you may experience mood swings and irritability, similar to—but often more intense than—PMS. Recent research has also highlighted the role of a brain steroid called allopregnanolone (ALLO), which helps regulate mood. The hormonal changes during weaning, and the return of menstruation, may alter how ALLO interacts with your brain’s receptors. In some women, instead of alleviating depressive symptoms, ALLO may actually contribute to them, particularly if you’re sensitive to hormonal fluctuations.
Emerging research is continuing to explore these hormonal and neurological changes, helping us better understand why some women experience post-weaning depression while others do not. This is an important step in addressing the mental and physical challenges that come with weaning.
On top of all this, your body is also adjusting to the physical process of stopping milk production. Whether weaning happens gradually or suddenly, your body needs time to recalibrate, which can lead to temporary feelings of fatigue, low energy, or irritability.
These changes are a normal part of the weaning process, but they can feel overwhelming when paired with the emotions of this transition. It’s important to recognise that your body is working hard to adapt. Be patient with yourself and approach this time with self-compassion. And remember, if you’re feeling overwhelmed, you’re not alone. Your experiences are valid, and support is always available.
