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New Hope IVF, Fertility & Research Center

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Check Your Fertile Days

When Are You Most Likely to Ovulate?

Enter the date of your last period and your usual cycle length to get an estimated fertile window.

Estimate

See when you may ovulate based on your cycle length.

Check Your Dates

See the days that may fall within your fertile window.

Need Help?

If your periods are irregular or you have been trying to conceive, talk to a fertility specialist.

Ovulation Calculator

Enter your cycle details to check your estimated fertile days.

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Your Estimated Fertility Calendar

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Fertile Window -
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Approx. Ovulation -
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Next Period -
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Pregnancy Test Day -

These dates are only estimates and may vary from cycle to cycle. If your periods are irregular or you have been trying to conceive for some time, speaking with a fertility specialist can help.

Understanding your cycle

Ovulation is only one part of fertility

Timing matters, but egg quality, sperm health, hormones, tubes, uterus health and age also affect pregnancy chances.

What is ovulation?

Ovulation happens if an egg is released from one of your ovaries. It usually happens once during a cycle. If sperm is present when the egg is released, pregnancy can happen.

For many women, ovulation happens about two weeks before the next period. This isn't the same for everyone, and it can also change from one cycle to another.

How does this calculator work?

Enter the first day of your last period and your usual cycle length. The calculator uses these dates to give you an estimated ovulation date and fertile window.

Keep in mind:

  • It works best when your cycles are fairly regular.
  • The dates are an estimate, not an exact prediction.
  • It cannot confirm that you have ovulated.
  • The result may not be reliable if your periods are irregular.

Changes you may notice around ovulation

Some women notice changes around this time, such as:

  • Clear or stretchy vaginal discharge
  • A slight rise in body temperature
  • Mild pain in the lower belly
  • Sore breasts or bloating
  • A change in sex drive

You may not notice any of these changes, and they cannot confirm ovulation by themselves.

What if your periods are irregular?

If your periods don't come at regular intervals or the gap between them changes a lot, this calculator may not give you a useful estimate.

Irregular periods can happen because of PCOS, thyroid problems, changes in weight, stress, or other health conditions. If this happens often, it's worth discussing with a doctor.

When should you see a fertility specialist?

Trying to conceive but still not getting pregnant?

If you've been trying for a while without success, a fertility check-up can help your doctor look at possible reasons.

You may want to get checked if:

  • You're under 35 and have been trying for 12 months
  • You're 35 or older and have been trying for 6 months
  • Your periods are very irregular or have stopped
  • You have PCOS, endometriosis or another condition that may affect fertility
  • You have had repeated miscarriages
  • You're over 40 and want to discuss your fertility sooner

At New Hope IVF, we can help with:

  • Ovulation and cycle tracking
  • Hormone and fertility tests
  • Semen testing and male fertility checks
  • IUI, IVF and ICSI
  • Choosing the right treatment based on your test results
What happens when you come to New Hope IVF?

The calculator can give you an idea of your fertile days. A consultation goes further by looking at your health and fertility history.

1

We start with your history

Tell us about your periods, how long you've been trying, and any previous fertility treatment.

2

We check what needs checking

Depending on your history, this may include an ultrasound, blood tests or a semen test.

3

We look at possible causes

Your doctor may look at ovulation, sperm, the fallopian tubes, the uterus and other factors.

4

We discuss treatment

Your doctor will explain the options that fit your situation, which may include IUI, IVF or ICSI.

Frequently asked questions

Ovulation & Fertility FAQs

No. Day 14 is only an estimate for a 28-day cycle. Ovulation can happen earlier or later, and it may not fall on the same day every month.
There are usually about six fertile days in a cycle — the five days before ovulation and the day of ovulation.
You can, but the result may not be reliable. When your periods don't follow a regular pattern, it is harder to estimate ovulation from dates alone.
If you're below 35 and have been trying for a year without getting pregnant, it may be time for a fertility check-up. If you're 35 or older, consider getting checked after six months. You may want to speak with a doctor sooner if your periods are very irregular or you already have a condition that may affect fertility.
Having sex around ovulation can improve the chance of pregnancy, but timing is only one part of the picture. Ovulation, egg quality, sperm health, the fallopian tubes, the uterus, and age can also affect your chances.

Trying to conceive but not sure what to do next?

Talk to our fertility team about your periods, ovulation, previous treatment, or fertility concerns.

Get fertility guidance

Fill your details. Our team will receive your enquiry and you will be redirected to WhatsApp.