Cycle, hormones & conception
The Female Fertility portal.
Add your cycle, ovulation, and reproductive history - then upload a hormone panel - and Merlin reads them together for a pre-conception picture, not just values.
Cycle map
Follicular → Luteal · Day 13
What it reads
- Cycle and ovulation history sitting next to the hormone panel, because estradiol on day 3 and estradiol on day 21 are two different questions.
- The arc below is one account: preconception, pregnancy, and the fourth trimester in a single record.
The other portals
- Fluid Biochemistry · Blood & urinalysis
- Imaging · Radiological studies
- Gastrointestinal · Microbiome & gut barrier
- Genetics · A lens on your blueprint
- Musculoskeletal · Structure, movement & pain
- Neuropsychiatric · Mood, sleep & self-exploration
- Male Fertility · Sperm, hormones & conception
- Spirituality · Meaning, purpose & the transcendent
- Nutrition · How you eat
- Sleep · Rest & recovery
Preconception · Pregnancy · Fourth Trimester
Three stages, three apps, and none of them has ever seen your bloodwork.
The usual path is one app for the cycle, a second for the pregnancy, and a third that stops at the six-week visit. Merlin holds all three in one account, and it is the only one of them reading your labs against the stage you're actually in.
The cycle, read in phase.
- Period and ovulation logged, fertile window mapped on the calendar.
- AMH, FSH, estradiol, progesterone read against the day of the cycle they were drawn on.
- How heavy the bleeding is, carried straight into your iron.
- His semen analysis read alongside yours, not in a separate clinic.
Cycle · Reads · Plan
Weeks and days, the way you'll hear it.
- 28+3, not “around seven months”. What's happening this week, from week 4 to week 41.
- Thyroid, ferritin, and hemoglobin read against trimester ranges instead of the standard adult ones.
- Every supplement, herb, and medication you're taking, screened for this stage.
- What happened in a previous pregnancy carried forward, with the words to ask for what it earns you.
Today · Week · Taking · Nutrition · Watch
The part that usually ends at six weeks.
- Bleeding, blood pressure, and mood logged daily, with what each one means today.
- When to call your provider, when to be seen the same day, and when to call 911.
- Breastfeeding or pumping, with every supplement checked against a lactation monograph.
- Why your thyroid and ferritin look like that right now, and what to hand back to your provider.
Warnings · Today · Feeding · Birth
A tracker predicts a date. This one reads the panel, names what to raise at your next appointment, and still has your history the year after the birth.
Start where you are - freeMerlin is an intelligence tool, not a diagnostic service, and nothing here replaces your prenatal or postpartum care. If something feels wrong, call your provider. In an emergency, call 911.
Bring what you already have to this portal, or any of the others, and you get it back read against everything else. The first read is free.
Get your first read - free