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What role do hormones play in weight loss after pregnancy?

Hormonal shifts play a central role in postpartum weight regulation. Estrogen and progesterone drop rapidly after birth, which can affect mood, energy, and metabolism. Cortisol often rises due to physical recovery, disrupted sleep, and ongoing stress. Elevated cortisol signals the body to conserve energy and can increase fat storage, particularly around the abdomen.


If breastfeeding, prolactin adds another layer by prioritising energy availability for milk production. These hormonal conditions are adaptive, not dysfunctional, but they can slow fat loss temporarily. Supporting hormonal balance involves managing stress, eating regularly, prioritising protein, and avoiding excessive training loads.

 

Weight loss becomes more achievable as hormonal patterns stabilise over time, especially when recovery is respected rather than rushed.

References and further reading

Psychosomatics: Hormonal Changes in the Postpartum and Implications for Postpartum Depression

 

The International Journal of Applied and Basic Nutritional Sciences: Obesity and cortisol

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​Dovepress: Postpartum Metabolism: How Does It Change from Pregnancy and What are the Potential Implications?

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​HSE Post-Birth Well-being Plan

This is a picture of Coach Alan, the founder of Mind Body Training.

ABOUT THE AUTHOR

Coach Alan is a qualified ITEC Level 3 Personal Trainer with over 9 years of coaching experience in health and fitness. He is also the founder of Mind Body Training, where his work focuses on sustainable fat loss, strength training, and long-term behavioural change for adults.

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Alan is also a psychotherapist-in-training with the Irish Institute of Counselling and Psychotherapy (IICP). His approach is informed by evidence-based principles from exercise science, nutrition and psychology, with an emphasis on realistic habit formation and stress-aware lifestyle change. 

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