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Peak Fertility and Proov: The Perfect Pair!

Whether you’re new to Proov or you’ve been Prooving for a while now, you’ve probably heard us mention “peak fertility.” Monitoring peak fertility is an important step when testing PdG with Proov; it lets you know exactly when you should be testing!

Besides its place in Proov testing protocol, peak fertility is a critical box on your fertility checklist. It lets you know when intercourse has the best chance of resulting in conception. Understanding peak fertility can help you better understand your cycle and fertility!

What is peak fertility?

Peak fertility goes by a lot of names: you may have heard it called the “fertile window” or time of “suspected ovulation.” They all mean the same thing! Peak fertility is the most fertile time during your cycle, meaning it is when you are most likely to conceive.

Your most fertile days are the 5 days leading up to ovulation and the day suspected ovulation occurs, so 6 days in total. In a woman with a 28-day cycle, suspected ovulation would occur on cycle day 14 and her most fertile days would be cycle days 9 through 14. 

But, as we know, every woman is different and not every cycle lasts exactly 28 days. This is why it’s important to track your cycle to find your unique peak fertility days. The first step is by recognizing some of the common signs and symptoms of peak fertility.

What do I feel like during peak fertility?

There are a few symptoms that can signal you are at your peak fertility in that cycle. Many women often feel breast tenderness or soreness around the time ovulation occurs. Another common symptom is increased libido, or sex drive, which makes sense as this is when intercourse is most likely to result in pregnancy. Finally, some women may feel an ovulation pain known as mittelschmerz or “middle pain.” It is a pain that women may feel on one side of their the side of their abdomen from which the egg is released.

How do I track peak fertility?

Knowing your peak fertility day is important when TTC and when confirming ovulation with Proov. Luckily, there are many ways to track peak fertility:

Luteinizing Hormone (LH) tests: LH tests are also known as ovulation predictor kits. An LH surge triggers ovulation, so testing LH can predict when ovulation is supposed to occur.

Cervical mucus monitoring: Cervical mucus monitoring involves checking the consistency of your cervical mucus. During most of your cycle, cervical mucus is dry and sticky. When ovulation is about to occur, cervical mucus becomes wet, stretchy, and often resembles raw egg whites. 

Basal body temperature (BBT) tracking: BBT tracking involves tracking the body’s lowest resting temperature. Typically, BBT ranges from 97.0 to 97.7 degrees Fahrenheit, but when ovulation occurs, BBT will slightly dip. You can learn more about BBT here.

Why do I need to know my peak fertility when using Proov?

Peak fertility lays the framework for testing PdG with Proov. Since Proov confirms ovulation after it has happened, knowing when the egg was most likely released will tell you when to test with Proov in order to get accurate results. When testing with Proov, the specific method you use to track peak fertility isn’t important - choose whatever works best for you.

Once you’ve chosen a method, start tracking and determine your peak day. From there, count 7 days. On day 7 after suspected ovulation, start testing with Proov (using first morning urine, of course!). Continue testing daily on days 8, 9, and 10 after suspected ovulation. 

A single positive Proov test confirms ovulation and positive Proov tests all four days during the testing window confirm sufficient ovulation, meaning PdG stayed elevated long enough to support an egg if it were to be fertilized.

Peak fertility and Proov are the perfect pair! Together, they give you a complete ovulation picture.

Have any questions about peak fertility or Proov? Feel free to reach out to us at!