Free fertility tools

Plan smarter with quick, science-based estimates

Six tools to help you understand your cycle, fertility window, due date, IVF chances, PCOS risk profile, and upcoming periods — all calculated in your browser, none of your inputs leave this page.

Ovulation Calculator

Estimate your ovulation day and next period from your last menstrual period (LMP).

Most likely ovulation

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Fertile window

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Next period expected

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Pregnancy Due Date Calculator

Naegele's rule — estimated delivery date based on your LMP and cycle length.

Estimated due date

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Gestational age today

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Current trimester

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Conception window (approx.)

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Fertile Window Calculator

The 6-day window when conception is most likely (5 days before ovulation + ovulation day).

Fertile window starts

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Peak fertility (ovulation)

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Fertile window ends

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Best days to try

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IVF Success Calculator

Indicative live-birth probability for one IVF cycle, based on published SART / HFEA registry trends.

Female age (years)

BMI (kg/m²)

Prior IVF cycles

Primary diagnosis

Estimated live-birth chance per cycle

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Factors considered

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Indicative only. Real prognosis depends on AMH, antral follicle count, sperm quality, and clinic-specific factors — please consult a fertility specialist.

PCOS Symptoms Checker

Screens common PCOS indicators (loosely based on Rotterdam criteria). Not a diagnosis.

Likelihood profile

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Symptoms flagged

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A confirmed PCOS diagnosis requires clinical assessment, blood tests (LH, FSH, androgens, TSH) and a pelvic ultrasound. Use this checker as a conversation-starter only.

Period Calculator

Predicts your next several period dates from your last one and your usual cycle length.

Next 6 predicted periods

Predictions assume a regular cycle. Stress, travel, illness and hormonal changes routinely shift real dates — treat this as a planning guide, not a guarantee.

Important: These calculators provide general estimates for educational purposes only and are not a substitute for medical advice, diagnosis, or treatment. Individual outcomes vary widely. For personalised guidance, please book a consultation with our specialists.