Skip to main content


Close Cart

Your cart is empty.

Shop Oova Kit

More About Registration

Here are some things you should do:

  • Download the Oova App from the App Store and register. 
  • During registration, you will be asked to enter information about your menstrual cycle, general wellness and reproductive history.
  • It is important that you enter this information as accurately as possible.

A few pointers:

  • When asked when you had your last period, be sure to enter this correctly. This is a critical piece of information for the algorithm to make its initial predictions. (Why do I need to log my period in the Oova app?)
  • Estimate how long your cycle is. If you have irregular cycles, take an average of the lengths of your last 3 cycles. (Why does my cycle length matter?)
  • Be honest about any reproductive issues you may have. This will help train the algorithm to be even more personalized for you.

Why do I need to log my period in the Oova app?

Your period is a critical component of your menstrual cycle. It tells us when Cycle Day 1 is and enables us to estimate when your fertile window will be. Your period is one of the most important pieces of information you need to log in the app. 

During registration, it is important to enter the first day of your last period as accurately as possible. This information will be used to determine when your scanning window will open. If you enter the incorrect first day of last period upon registration, you will need to contact Oova Support ( to change the date to the correct one.

If you are using Oova for a subsequent cycle (i.e. your second or third time using Oova), then be mindful to log your period flow in your daily log. If this step is skipped, it will have bigger downstream effects on your scanning window as well as report generation.

Why does my cycle length matter?

Your cycle length is really important for our algorithm to map out where you are in your cycle. While the data and conclusions are ultimately determined by your hormone levels, your cycle length helps us figure out when you need to scan an Oova test. It also helps our algorithm interpret the hormone levels so we don’t prematurely tell you that you are in your fertile window or if you ovulated.

For your first cycle, our algorithm relies pretty heavily on the length you enter. This is why you will be unable to modify the cycle length going forward. However, as you continue to use Oova, we begin to learn more about your cycle length and begin to override information you entered based on what the data says.