Medical disclaimer
The tools on this site provide educational estimates. They are not medical advice, diagnosis, or treatment, and they do not create a clinician-patient relationship.
Estimates, not conclusions
Period, ovulation, fertile-window, due-date, and pregnancy-week results are calendar-based estimates. They depend on the dates you enter and on assumptions that may not match your body or your care team’s assessment. A result is not confirmation that ovulation occurred, that a pregnancy is developing as expected, or that labor has started.
Not a contraceptive method
Do not use calendar-based predictions to prevent pregnancy. They cannot reliably identify days when conception is impossible. Talk with a healthcare professional about contraception that fits your needs.
Pregnancy and contractions
A due date is a reference point, not a prediction of the exact day you will give birth. A contraction timer records timing but cannot assess whether you are in labor. Contact your maternity care team if:
- Contractions become regular or painful, especially before 37 weeks
- Your waters break or you have bleeding
- Your baby’s movements decrease or change noticeably
- You have severe pain, fever, or feel unwell
- Anything else worries you
If you think you or your baby may be in immediate danger, call your local emergency number.
No clinician review claim
This site does not claim review, approval, or endorsement by a clinician or medical organization. Content is written for general education and aims to describe common conventions clearly. It may not reflect the guidance of your local health service.
General resources
For general information, you may find these organizations useful. They are external sites with their own content and policies:
Use of this site
By using the calculators, you understand that the results are estimates and that you are responsible for decisions about your health. Seek professional advice for your specific situation.