Women's Health
Women's health involves unique considerations across different life stages, from menstrual cycles to fertility and pregnancy. Our free women's health tools help you track cycles, estimate fertile windows, and plan around pregnancy — clearly and based on established methods. These tools provide general estimates for education and planning; for personalised advice, your doctor or midwife is the right source.
Ovulation Calculator
Find your most fertile days and estimated ovulation date.
Pregnancy Due Date Calculator
Calculate your estimated due date and track pregnancy milestones.
Period & Cycle Calculator
Predict your next period, fertile window and ovulation date based on your last period and cycle length. Track your menstrual cycle with confidence.
Pregnancy Weight Gain Calculator
Find your recommended total pregnancy weight gain based on your pre-pregnancy BMI, using Institute of Medicine guidelines for a healthy pregnancy.
Understanding your menstrual cycle
The menstrual cycle is a monthly process that prepares the body for possible pregnancy. A typical cycle lasts around 28 days but commonly ranges from 21 to 35 days, and varies between individuals and over time. Understanding your own cycle helps you anticipate your period, recognise your fertile window, and notice changes worth discussing with a doctor.
Our period and ovulation calculators use your cycle information to estimate upcoming periods and fertile days. These are general estimates based on average patterns, and individual cycles vary, so they work best as a guide alongside how your own body behaves. For irregular cycles or specific concerns, a doctor can offer more tailored insight.
Fertility and planning for pregnancy
For those trying to conceive, understanding the fertile window — the days around ovulation when conception is most likely — can be helpful. Our ovulation calculator estimates this window based on your cycle, and the pregnancy due date calculator helps you plan once pregnancy begins. These tools support planning but are estimates, not guarantees.
Fertility depends on many factors, and conception timing is only one. If you are trying to conceive and have questions or concerns, or if conception is taking longer than expected, a doctor can provide guidance tailored to your situation. Our tools are a helpful starting point for understanding timing, not a substitute for medical advice.
Using these women's health tools
Our women's health tools include a period calculator, ovulation calculator and pregnancy due date calculator, each using established methods to give general estimates relevant to your cycle and circumstances. They help you understand and plan around your body's natural rhythms.
These tools provide educational estimates, not medical advice or diagnosis. Cycles and fertility vary widely between individuals, and many factors influence them. For personalised guidance, especially around fertility, pregnancy or any concerns about your cycle, your doctor or midwife is the right person to advise.
Frequently asked questions
How accurate are ovulation and period calculators?
These calculators give general estimates based on average cycle patterns, which are a useful guide for anticipating periods and fertile windows. However, individual cycles vary and can be irregular, so they are estimates rather than precise predictions. They work best alongside awareness of your own body, and a doctor can help with irregular cycles or specific concerns.
When am I most fertile?
The fertile window is generally the days leading up to and including ovulation, which in an average 28-day cycle occurs around day 14 — though this varies with cycle length. Our ovulation calculator estimates this window based on your cycle. Because timing varies between individuals and cycles, use it as a guide and speak to a doctor for personalised advice.
Are these women's health tools a substitute for a doctor?
No. These tools give educational estimates for planning and understanding, based on established methods. They do not provide medical advice or diagnosis. For personalised guidance around your cycle, fertility, pregnancy or any concerns, your doctor or midwife is the right source, as they can consider your full situation.