Little Greenhouse doesn't track anything without a real source behind it — and a generic, male-defaulted study doesn't count. Here's the research behind each part of the app, organized by topic.
How Little Greenhouse defines each cycle phase and the fertile window, sourced to the foundational conception-timing research and Johns Hopkins Medicine.
Polycystic ovary syndrome was renamed polyendocrine metabolic ovarian syndrome (PMOS) in May 2026. What changed, why, and how Little Greenhouse tracks it.
What separates PMDD from general PMS under DSM-5 criteria, and how Little Greenhouse's luteal-phase check-ins are timed around it.
Postpartum depression screening via the Edinburgh Postnatal Depression Scale, and ACOG's breastfeeding nutrition guidance, as used in Little Greenhouse.
Why NICE advises against relying on hormone blood tests for perimenopause, and why cycle-length variation is the marker Little Greenhouse actually tracks.
Why tic frequency, from the Yale Global Tic Severity Scale, is the first field in Little Greenhouse's Tourette's tracking rather than an afterthought.
How the Yale-Brown Obsessive Compulsive Scale's time/distress/interference framing shapes Little Greenhouse's compulsion check-in.
The AASPIRE Autistic Burnout Measure, built with autistic adults, behind Little Greenhouse's sensory, masking, and burnout tracking fields.
A 2024 self-rating instrument built specifically for long-term, app-based ADHD monitoring — the same format Little Greenhouse itself uses.
Why reading fatigue in dyslexia is a documented, trackable effect in its own right, and why self-report is a valid way to capture it.
Why Little Greenhouse's brief wellbeing screen uses PHQ-2, a validated two-item depression screening tool, rather than an invented mood scale.
Why endometriosis takes 7–10 years to diagnose on average, the new non-invasive blood tests changing that, and what symptom tracking can realistically contribute.