Where are you right now?
Pick up the path wherever you are, or follow the whole map from trying to conceive through to the early years.
Find your fertile window
Work out when you are most fertile, plan around your cycle, and read up on what really helps.
The longest two weeks
Once you've ovulated, the wait begins. Count the days, see when implantation is likely, and find the earliest moment a test could be reliable.
Following the numbers through IVF
If you're going through IVF or IUI, these tools help you make sense of trigger shots, test-out timing and rising hCG between clinic appointments.
Trigger Shot Test-Out
Estimate when an hCG trigger shot clears, so you can plan test-out timing.
IVF Milestones
Map your cycle from transfer or retrieval to beta tests, scans and due date.
Beta hCG Doubling
Enter two beta results to see the doubling time and 48-hour rise.
These tools are for planning and context, not a diagnosis. Your clinic's blood tests and scans are always the definitive answer.
Two lines. Now you're expecting
Date your pregnancy, see what is happening at every stage, and know what to expect at each appointment.
Due Date
From your last period, conception or IVF transfer, plus how far along you are.
Map Out My Pregnancy
Your whole pregnancy, week by week, what's happening and what to do at each stage.
How big is your baby?
Nesting, packing, getting set
Buy the right things at the right time and pack for the big day, without the last-minute panic.
They're here. The early years
Track your baby's exact age and the milestones to look forward to as they grow.
Hi, I'm Kelli
Creator of HerCycleCalc. After 5 years of infertility, 4 miscarriages and a failed IVF cycle, I built this site to make understanding your cycle and trying to conceive feel a little easier.
Popular this week
How to get pregnant
Timing, your fertile window and what genuinely helps your chances.
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Pregnancy week by week
What happens at every stage, and your NHS appointments along the way.
Read
Baby shopping timeline
What to buy and when, a tickable checklist built from your due date.
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Map out my pregnancy
A personalised week-by-week roadmap built from your due date.
OpenPrivate by design
Everything runs in your browser. We never store your dates or sell your data.
Gentle & judgement-free
Whatever your reason for checking, you'll find clear answers and kind words.
Evidence-informed
Our guidance reflects typical NHS pathways and links to trusted sources like the NHS and Tommy's.
Common questions
Quick answers, with links to the full guides.
How accurate are the calculators?
They give careful estimates from well-established methods and the dates you enter. They are not a substitute for medical advice, so your midwife or GP can confirm anything specific to you. More about how we build them.
Is my information private?
Yes. Everything runs in your browser, we do not store the dates you enter and there is no account to create. Read our privacy policy.
How do I know when I am ovulating?
Ovulation usually falls about 14 days before your next period, with signs like clearer, stretchier cervical mucus. Our ovulation calculator estimates it, and the fertile window guide explains the signs.
When should I take a pregnancy test?
From the first day of your missed period for the most reliable result. Testing earlier can give a false negative. More in early signs of pregnancy.
How is my due date worked out?
It is counted as 40 weeks from your last period and refined by your dating scan, so treat it as the middle of a range. Try the due date calculator or read how due dates are calculated.
Does it cost anything?
No. Every calculator and guide is free, with no sign-up. Some product links may earn us a small commission, which keeps the site free and never changes what we suggest.
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Everything in one place, whenever you need it.