How many weeks pregnant calculator

How to use the advanced ovulation calculator & fertility calendar?

1. Begin by selecting the first day of your last menstrual period. Simply tap on the date in the calendar.

You can navigate to the previous or next month using the > and < arrows.
2. Next, indicate the average length, or number of days, of your menstrual cycle.
3. Tap the blue 'CALCULATE' button to see the results.
4. For a thorough understanding of the results, we strongly recommend reviewing the FAQs below.

Are online ovulation calculators & fertility calendars accurate?

Many online ovulation calculators and fertility apps may provide inaccurate information.

Pregnancy week calculator by due date

To test their accuracy, consider this example: For women with an average cycle of 28 days, most apps suggest fertile days between day 11 and 15 of the cycle. However, according to the "Standard Days Method" (SDM), a contraception method with a 95% effectiveness rate, days 8 to 19 of a woman's menstrual cycle are fertile for those with a cycle length between 26 to 32 days.

This highlights the potential for missed opportunities for concepti

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