The evidence behind This Is Perimenopause
Here are examples of 20 of them.
A concise evidence snapshot spanning reproductive endocrinology, neuroscience, hormone therapy, gut-brain medicine, metabolic health, stress physiology and the biopsychosocial determinants of health.
Endocr Rev, 1998
Design & population
Expert narrative review; no study population.
What it found
Comprehensive review of the endocrinology of the menopausal transition.
Why it matters in perimenopause care
Foundational reference for understanding perimenopause as an endocrine state in its own right rather than simply early menopause.
Nat Rev Endocrinol, 2015
Design & population
Invited review; no study population.
What it found
Describes perimenopause as a neurological transition and the uncoupling of estrogen-receptor signalling from brain bioenergetics.
Why it matters in perimenopause care
Helps explain why brain fog, sleep disruption and mood change can be integral features of the transition.
Sci Rep, 2023
Design & population
Phase III double-blind randomised placebo-controlled trial; 4 months; 189 perimenopausal women aged 35-58.
What it found
Primary vasomotor score did not significantly differ from placebo. Progesterone users reported fewer night sweats, better sleep and less interference with daily life; no serious adverse events.
Why it matters in perimenopause care
A placebo-controlled trial specifically testing oral micronised progesterone in perimenopausal women.
Am J Prev Med, 1998
Design & population
Cross-sectional ACE Study; 9,508 adults.
What it found
A graded relationship was found between adverse childhood experiences and later health-risk behaviours and disease.
Why it matters in perimenopause care
Established the association between childhood adversity and adult health, supporting a biopsychosocial view of health.
PNAS, 1998
Design & population
Evolutionary hypothesis paper; no study population.
What it found
Proposes that long postmenopausal lifespans evolved alongside grandmothering and food sharing.
Why it matters in perimenopause care
Reframes the post-reproductive years as an evolved feature of human life history rather than simply decline.
Lancet, 2024
Design & population
Review; first paper in the Lancet Series on menopause.
What it found
Proposes an empowerment model in which the patient is an expert in her own condition and an active partner in care.
Why it matters in perimenopause care
A current high-profile model for menopause care built around knowledge, agency and partnership.
Facts Views Vis Obgyn, 2011
Design & population
Narrative review and clinical argument.
What it found
Describes erratic, often higher estradiol alongside lower progesterone in symptomatic perimenopause and argues that women are frequently counselled and treated inaccurately.
Why it matters in perimenopause care
Names the clinical gap in perimenopause care and challenges a simple estrogen-deficiency model.
J Clin Endocrinol Metab, 1996
Design & population
6-month observational study; 11 perimenopausal women compared with reproductive-age and other groups.
What it found
Perimenopause showed shorter cycles, higher FSH/LH and estrogen activity, and reduced luteal progesterone; changes were observable from the early 40s.
Why it matters in perimenopause care
Direct hormonal measurement shows that perimenopause is not simply a state of estrogen deficiency.
J Clin Endocrinol Metab, 2020
Design & population
8-week observational study; 50 unmedicated perimenopausal women with mild-moderate depressive symptoms.
What it found
Greater estradiol variability and absence of progesterone levels consistent with ovulation were independently associated with higher depressive symptom scores.
Why it matters in perimenopause care
Links mood symptoms with hormonal dysregulation rather than assuming they arise only from vasomotor symptom burden.
Annu Rev Med, 2022
Design & population
Authoritative review; no study population.
What it found
Reviews bidirectional brain-gut-microbiome interactions and the evidence and limits surrounding microbiome causality.
Why it matters in perimenopause care
Provides an evidence-based foundation for considering gut-brain communication while remaining clear about current scientific limits.
Physiol Behav, 2012
Design & population
Review; no study population.
What it found
Reviews enduring nervous, endocrine and immune changes associated with childhood adversity, including HPA-axis activation and inflammation.
Why it matters in perimenopause care
Provides biological mechanisms linking lived experience and chronic stress with later health.
Syst Rev, 2016
Design & population
Systematic review and meta-analysis of observational studies; 86,881 postmenopausal women.
What it found
Progesterone with estrogen was associated with lower breast-cancer risk than synthetic progestins with estrogen (RR 0.67, 95% CI 0.55-0.81).
Why it matters in perimenopause care
Shows why body-identical progesterone and synthetic progestins should not automatically be treated as equivalent.
Breast Cancer Res Treat, 2008
Design & population
Prospective E3N cohort; 80,377 postmenopausal women; 2,354 invasive breast cancers.
What it found
Breast-cancer risk differed according to the progestogen combined with estrogen; estrogen plus progesterone showed a different risk profile from several other combinations.
Why it matters in perimenopause care
Shows that hormone-therapy risk depends partly on the specific progestogen used.
JAMA, 2020
Design & population
Long-term follow-up of two placebo-controlled randomised trials; 27,347 postmenopausal women; >20 years median follow-up.
What it found
CEE plus medroxyprogesterone acetate was associated with higher breast-cancer incidence; CEE alone after hysterectomy was associated with lower incidence and mortality.
Why it matters in perimenopause care
Clarifies the WHI evidence by showing that outcomes differed between specific hormone regimens.
Endocr Rev, 2013
Design & population
Review; no study population.
What it found
Documents major differences among progestogens in structure, metabolism, receptor affinity, potency and clinical effects.
Why it matters in perimenopause care
Establishes that natural progesterone and synthetic progestins cannot be assumed to have a single class effect.
BMC Gastroenterol, 2014
Design & population
Review; no study population.
What it found
Reviews the intestinal barrier and conditions associated with increased permeability, while emphasising limitations in definitions, measurement and clinical significance.
Why it matters in perimenopause care
Supports intestinal permeability as a legitimate research target while keeping the limits of the evidence explicit.
Gut, 2014
Design & population
Experimental human studies; 23 healthy volunteers, then 13; positive comparator and pharmacological blockade.
What it found
Acute psychological stress increased small-intestinal permeability; CRH reproduced the effect and mast-cell stabilisation blocked it.
Why it matters in perimenopause care
Demonstrates in humans that acute psychological stress can increase gut permeability.
Cell Metab, 2017
Design & population
Review; no study population.
What it found
Defines metabolic flexibility as the capacity to adapt fuel use to changing metabolic demand and reviews metabolic inflexibility in obesity and type 2 diabetes.
Why it matters in perimenopause care
Provides the reference framework for metabolic flexibility underpinning the metabolic-health component of the book.
Endocr Rev, 2013
Design & population
Review of rodent and human literature.
What it found
Reviews estrogen-receptor effects on appetite, energy expenditure, fat distribution, insulin sensitivity, inflammation and insulin secretion.
Why it matters in perimenopause care
Explains why changing estrogen signalling can influence metabolic health and why metabolic change is not simply a matter of willpower.
Lancet Public Health, 2017
Design & population
Systematic review and meta-analysis; 37 studies; 253,719 participants; 23 health outcomes.
What it found
Four or more adverse childhood experiences were associated with increased risk across all 23 outcomes, with effect sizes varying substantially by outcome.
Why it matters in perimenopause care
Quantifies the relationship between childhood adversity and adult health across a large pooled population.
Full references
