Hormones, Mood and the Nervous System: What Teenage Girls and Their Parents Should Know

For teenage girls and young women, the relationship between hormones and mental health is one of the most significant and least talked about parts of the wellbeing picture. Hormonal changes do not just affect mood in the way we tend to casually describe — they influence how the brain processes stress, regulates emotion, experiences connection and responds to the world around it.

Understanding this relationship does not just explain why some weeks feel harder than others. It provides a genuinely useful framework for making sense of anxiety, emotional dysregulation, burnout and the experiences that can feel confusing or overwhelming without context.

This post explores the science behind the hormone-nervous system connection, what it means for girls and young women specifically, and how this understanding can support mental health and wellbeing.

Why This Matters Specifically for Girls and Young Women:
The hormonal changes of adolescence and early adulthood are significant — and they interact with the nervous system in ways that are distinct from the experience of adult men or younger children.

Oestrogen, progesterone and other reproductive hormones fluctuate across the menstrual cycle, across the transition of puberty, and across the broader developmental arc of adolescence. These fluctuations have direct effects on neurotransmitter systems including dopamine, serotonin and GABA — all of which play central roles in mood regulation, anxiety, attention and emotional processing.

For neurodivergent girls and young women, this connection is particularly significant. Dopamine, which plays a central role in ADHD, is directly influenced by oestrogen. This means that ADHD symptoms — including concentration difficulties, emotional dysregulation and executive functioning challenges — can fluctuate meaningfully across the menstrual cycle. Many girls and young women notice that the week before their period is significantly harder, without always understanding why.

Similarly, conditions such as Premenstrual Dysphoric Disorder (PMDD) — which involves severe mood-related symptoms in the luteal phase of the menstrual cycle — occur at significantly higher rates in neurodivergent women than in the general population. Recognising this overlap is an important part of understanding the full picture for many girls and young women.

Hormones and the Brain:
Hormones such as oestrogen, progesterone, and cortisol influence neurotransmitters like serotonin, dopamine, and GABA, all of which play key roles in emotional regulation, focus, and sleep. When these hormonal systems are in flux, the brain’s stress and reward circuits can also shift, altering how we experience pleasure, motivation, or safety.

For example, during the premenstrual phase, lower oestrogen and progesterone can affect serotonin levels, leading to increased sensitivity, irritability, or sadness. For some, these changes are significant enough to cause Premenstrual Dysphoric Disorder (PMDD), where mood symptoms are more severe and can interfere with daily functioning. Similarly, hormonal changes during pregnancy, postpartum, or perimenopause can influence mood and cognitive function, sometimes amplifying existing anxiety, ADHD, or trauma responses.

The Nervous System’s Role:
From a nervous system perspective, hormonal fluctuations can affect neuroception (the body’s subconscious process of detecting safety or threat). When hormones are imbalanced or stress is chronic, the autonomic nervous system may remain in a heightened state of vigilance. This can make calm feel harder to access, sleep more disrupted, and emotions more reactive.

Hormones also interact with the body’s stress response system, influencing how easily we move between sympathetic activation (alertness and stress) and parasympathetic recovery (rest and restoration). Over time, chronic stress can alter hormonal balance, while hormonal imbalance can reinforce stress reactivity, creating a feedback loop that impacts mood and energy.

Neurodiversity and Hormonal Sensitivity:
For neurodivergent individuals, such as those with ADHD or autism, hormonal changes can have an even stronger impact. Research suggests that oestrogen levels can influence dopamine availability in the brain, which affects attention, impulse control, and motivation. This may explain why many women report heightened ADHD symptoms or emotional dysregulation around hormonal transitions.

Understanding this interaction can help reduce self-blame and encourage self-compassion. It’s not a lack of willpower, it’s your nervous system and hormones communicating that extra support or adjustment may be needed.

When to Seek Support:
If you notice significant mood changes before your period, persistent fatigue, or increased anxiety around hormonal shifts, it may be worth exploring these patterns with a medical professional. PMDD, perimenopausal transition, and postnatal adjustment periods can all place unique stress on the nervous system and may require tailored support.

Working with a psychologist can also help you to identify early signs of dysregulation, develop regulation skills, and explore patterns of perfectionism, burnout, or emotional fatigue that often accompany hormonal changes.

• Understand the links between hormonal changes, mood, and regulation
• Develop grounding and self-regulation skills for emotional stability
• Address perfectionism, exhaustion, and self-criticism that may arise
• Build supportive routines around rest, nourishment, and recovery
• Reconnect with your body’s signals and rebuild trust in your internal rhythms

Ready to Get Started? Understanding the connection between hormones, the nervous system and mental health is one part of the picture. Having the right support is another. 

If you recognise any of the patterns described in this post — in yourself or your daughter — psychological support is available now with no waitlist. 

For more information about our approach to neurodiversity and the hormone-mental health connection, visit our Neurodiversity Support page. 

For information about fees and funding options including Medicare, NDIS and private fee sessions, visit our Fees and Funding page.

Whether you are ready to book or simply have a question, send an email to info@nvpsychology.com.au — we are always more than happy to help.

This article provides general information only and is not a substitute for personalised psychological or medical advice, assessment or treatment. If you are in crisis or feel unsafe, please call Triple Zero (000). You can also contact Lifeline on 13 11 14 for 24-hour support.