Bloom — Circalunar & Ovulatory Intelligence | Journal du Pôle

Journal du Pôle · Workshop Bloom · 31 May 2026 · Blue Moon

Circalunar Intelligence
& the Ovulatory Body

An interactive science atlas of biological rhythms, movement optimisation, and the body's relationship with the lunar cycle — for people with ovulatory cycles. Rooted in peer-reviewed science; centred on equity.

Your Personalised Phase Compass

Age

First day of last period

Avg. cycle length

Flag any that apply (shapes your protocol)

Outer Ring

Lunar Cycle
29.5 days

8 canonical moon phases, real-time position calculated from today's date (UTC). Hover a phase for detailed information. Drag to rotate and align with your current lunar position.

Inner Ring

Ovulatory Cycle
~28 days

4 ovulatory phases, counter-rotating. Each arc represents the typical phase duration. Calibrate the ring offset using the controls below the orrery to align with your actual current phase.

Centre

Phalaenopsis Orchid
Phase morphology

A crimson Phalaenopsis orchid — the somatic mirror of the ovulatory cycle. Its morphology shifts through 5 stages: dormant spike → bud swell → anthesis → second bloom → senescence.

Dormant Spike · Menstrual

Drag outer ring to rotate · Adjust inner ring offset to align with your actual phase

Today · Real-Time

Calculating…

Blue Moon · 31 May 2026

Micromoon · Full Moon

Second full moon of May 2026. Peaks 08:45 UTC / 11:45 EAT. A micromoon — near lunar apogee, so visually slightly smaller but energetically significant. If your cycle is ~28–30 days and menstruation began around 3–4 May, ovulation aligns with this full moon.

Suri Entrainment Research

Rural East Africa &
Circalunar Synchrony

Abbink (2015): Suri agro-pastoralist girls in SW Ethiopia actively map menstruation to lunar phases, using synchrony as reproductive agency — a cultural strategy absent pharmaceutical contraception. The photic mechanism: moonlight → melanopsin (ipRGC) → SCN → melatonin → kisspeptin → GnRH pulse timing.

The Synodic Month — 8 Canonical Phases · Hover for Details · Aligned to Real Dates

The Four Biological Rhythm Frameworks

~24h

Circadian

The master clock. Cortisol, melatonin, temperature, alertness — all governed by the suprachiasmatic nucleus (SCN). Light is the primary zeitgeber. The luteal phase measurably blunts melatonin and cortisol amplitude.

~28d

Infradian — Ovulatory

Driven by FSH, LH, oestradiol, and progesterone through the HPO axis. Cycle length in continental African women: 25–32 days, mean 28±2 (Bauman et al.). For women of African descent, circulating oestradiol is 25–36% higher than in comparable Caucasian cohorts — a structural endocrine reality, not an anomaly.

~29.5d

Circalunar

The synodic month. Helfrich-Förster et al. (Science Advances, 2021 & 2025): cycles of 26–36 days intermittently synchronise with lunar luminance cycles. Effect strongest before 2010 — artificial light exposure has substantially disrupted this ancient entrainment.

~365d

Circannual

Seasonal modulation. Lunar–menstrual synchrony is strongest in winter months. January records the greatest gravitational coupling between Moon, Sun, and Earth — detectable in post-2010 data despite artificial light noise.

Health Equity · Structural Data Gaps · East & Sub-Saharan Africa

The body's data is not racially neutral

The ovulatory and circalunar science in this tool draws almost exclusively from European and North American cohorts. Sub-Saharan Africa contains the world's largest population of Black women — yet it is systematically underrepresented in reproductive endocrinology, sports science, and chronobiology research. The gap is structural, not incidental. New data from continental Africa confirms distinct endocrine architecture: the absence of that data in global models is not a neutral absence — it encodes Caucasian physiology as the default.

Endocrine Architecture · O'Connor et al. 2011

Women of African descent produce oestradiol 25.3% higher in the late follicular phase and 36.4% higher in the luteal phase compared to Caucasian cohorts of identical BMI and age. Mechanism: amplified peripheral aromatase activity — not elevated gonadotropins. This is a baseline structural reality with downstream implications for fibroid genesis, cycle length, and athletic recovery.

Athletic Performance · COSAFA 2021 / Abong'o 2023

90% of elite African women footballers use no hormonal contraceptives. 53% compete through debilitating cramping; 36% use improvised sanitary alternatives during matches. 95% of coaches and 91% of players cannot name a menstrual phase. Cycle-synchronous training is structurally absent from African women's athletics infrastructure.

Vitamin D Deficiency · Jukic et al. 2016

76% of Black women operate below the clinical sufficiency threshold for Vitamin D (≤20 ng/mL). Deficiency produces a 13.3× increase in odds of cycle irregularity and directly amplifies myometrial oestrogen receptor density — compounding fibroid risk. The mechanism: melanin filters UVB required for cutaneous Vitamin D synthesis. Modern indoor lifestyles have removed compensatory sun exposure.

Fibroid Pathology · Wango et al. (Kenya)

Kenyan data shows fibroid tissue carries oestrogen receptors at 28.2 fm/mg protein vs 19.1 in adjacent normal myometrium. Progesterone receptors similarly amplified. This receptor hypersensitivity — not just circulating hormone levels — drives aggressive growth. Continental genomic sequencing studies are almost entirely absent. Clinical data relies on diaspora proxy cohorts.

80%+Cumulative lifetime fibroid incidence in Black women globally (vs ~25% in white women)

46.98%Pooled PMS prevalence across continental Africa — up to 66% in secondary school students (Kassa et al. 2024)

26.3%Ghanaian women under 35 presenting with fibroids ≥5cm — requiring surgical intervention (Sarkodie et al.)

6.24×Increased fibroid risk for Nigerian women with menarche at or before age 11 (Ezeama et al.)

#MakeFibroidsCount · Lupita Nyong'o · 2025–26

"I was taught that periods mean pain. I didn't know to be worried." — Lupita Nyong'o, diagnosed with over 77 uterine fibroids, launched the #MakeFibroidsCount campaign in July 2025 with the Foundation for Women's Health alongside the U-FIGHT Act: $150 million over five years for fibroid research and early detection. Her testimony is a structural indictment of the education and research gap. → Support #MakeFibroidsCount

⚠ Data Research context: The majority of ovulatory cycle, circalunar synchrony, and exercise performance studies recruit from European and North American populations. Values presented in this tool represent population averages from those cohorts. Emerging data from continental Africa (Kenya, Ghana, Nigeria, Ethiopia) indicates distinct hormonal architecture in women of African descent — these datasets are underrepresented and in most cases absent from the foundational literature. Where African-specific data exists, it is cited explicitly.

⚠ Clinical This tool is for educational purposes only. It does not constitute medical advice, diagnosis, or a clinical protocol. Phase calculations are estimates based on calendar methods; individual hormonal environments vary significantly. If you are pregnant, perimenopausal, managing PMDD, or have a fibroid diagnosis, please seek guidance from a qualified physiotherapist, gynaecologist, or sports medicine physician before applying any movement recommendations.

Circalunar & Chronobiology

Helfrich-Förster C, et al. (2021). Women temporarily synchronize their menstrual cycles with the luminance and gravimetric cycles of the Moon. Science Advances. doi:10.1126/sciadv.abe1358

Helfrich-Förster C, et al. (2025). Science Advances. doi:10.1126/sciadv.adw4096

Cajochen C, et al. (2013). Evidence that the lunar cycle influences human sleep. Current Biology. doi:10.1016/j.cub.2013.06.029

Baker FC & Driver HS (2007). Circadian rhythms, sleep, and the menstrual cycle. Sleep Medicine Reviews. PMID:17383933

Raible F, et al. (2017). Opsins and clusters of sensory G-protein-coupled receptors in the sea invertebrate. Frontiers in Neurology. Frontiers

Abbink J. (2015). Girls' menstrual synchrony in Suri agro-pastoralist Ethiopia. Cahiers d'Études Africaines. OpenEdition

Exercise & Ovulatory Phase

Scientific Reports (Nature) (2026). Exercise performance and the menstrual cycle. Nature.com

Sports Medicine Open / PMC (2025). Cognition and the menstrual cycle. PMC12511478

Carmichael MA, et al. (2021). The impact of menstrual cycle phase on athletes' performance: a narrative review. International Journal of Environmental Research and Public Health. PMC7916245

Ntlhoa et al. (2021). Menstrual health practices among elite African women footballers. PMID:36540914

Abong'o et al. (2023). Menstrual cycle knowledge in African women's football. WSPAJ. Human Kinetics

Endocrinology — Women of African Descent

O'Connor KA, et al. (2011). Estradiol and progesterone in African-American vs. Caucasian women. ResearchGate

Setiawan VW, et al. (2006). Race/ethnicity and ovarian cancer risk. PMC2375205

Fibroid Epidemiology — Africa

Eltoukhi HM, et al. (2014). The health disparities of uterine fibroid tumors for African American women. Am J Obstet Gynecol. PMC3874080

Wango EO, et al. (2002). Estrogen and progesterone receptors in fibroids in Kenyan women. EAS Publisher

Sarkodie BD, et al. (2016/2023). Ultrasound characteristics of uterine fibroids in Ghanaian women. PMC4754812

Morhason-Bello IO, et al. (2022). Uterine fibroid epidemiology in Sub-Saharan Africa. PMC9353014

Uterine fibroids: African perspective. PMC7344264

PMS, PMDD & HPA Axis

Kassa GM, et al. (2024). Prevalence of premenstrual syndrome in Africa: systematic review and meta-analysis. PMC10865226

Ekpenyong CE, et al. (2011). Academic stress-induced menstrual disorders in Nigerian undergraduates. Source

Howell EA, et al. (2010). Racial differences in PMDD and premenstrual symptoms in an epidemiological cohort. PMC3404818

Vitamin D & Ovulatory Regularity

Jukic AMZ, et al. (2016). Vitamin D is associated with risk of long menstrual cycles in a cohort of Black and White women. PMID:26997249

Advocacy & Policy

Foundation for Women's Health × Lupita Nyong'o. #MakeFibroidsCount campaign. foundationwomenshealth.org

Welcome to this signature open-level pole dance workshop, avec or sans heels, comprised of my favourite spinning spiralling shapes. We'll open our ritual practice with some intentional breathwork and warm-up integrating some of my favourite conditioning exercises to build lines.

In the rose garden, we'll sow the seeds of mindful movement, with some psychosomatic (mind-body) transits into inverts, inside leg hangs, laybacks, titanic or Bird or Paradise or ballerina (with progressions and regressions for eagle & capezio) each to their own ability, watering ourselves carefully as we go along, and pruning our lines as we bloom. Finally, efflorescent, we'll explore pole de bras, the kinetic expansion and contraction of arms, often in concert with our legs, taking time to enjoy what feels good as we wilt.

As the short rains fade, and the dry season rolls in we hold space not only to bloom, but also to wilt, consolidate our growth and renew. It's an opportunity to explore the devastating beauty the full range of expressive movement holds in deliberate general coincidence with January’s Wolf Moon.

The still and film curated on this page are from my pandemic archive recordings of blooming flowers from a National Geographic timelapse projected onto voile curtains in Nairobi, during my evening practice.

I hope to see you soon, sending all my love.

Bisous!

A.T.

Journal du Pôle · Ateliers de Pôle présente Bloom