How To Choose The Best Ovulation Kit

According to the Centers for Disease Control and Prevention, more women wait longer to start a family. In fact, in 2014, the average age for first trimester pregnancies was 26.3. We are seeing a decrease in women having babies in their teen years. And an increase in women conceiving and giving birth later in their thirties.

While fewer teenage pregnancies is a positive sign, many more women are having trouble conceiving. This is because women are most fertile at 19-26 years old. They have a 50% chance of becoming pregnant within two days before ovulation. When a woman hits 27, her fertility rate drops to 40%. And by age 35, it drops further to a 30% rate. In other words, getting pregnant gets harder as us women get older. That doesn’t mean it’s impossible.

Thanks to technological advancements, we now have a variety of ovulation kits. These kits help us know the best time to conceive, increasing the chances to become pregnant. This is great!

However, with so many ovulation kits on the market, it’s hard to know which one is right for you. This is why we’ve created this article to help you pick the best ovulation kit for you. Read on!

But First, How Does Ovulation Work?

Ovulation occurs during the first two weeks (roughly Day 10 to Day 19) of your menstrual cycle. The hypothalamus, a part of the brain responsible for hormone production, signals to the anterior lobe and pituitary gland to secrete luteinizing hormone (LH) and follicle-stimulating hormone (FSH). And so ovulation begins.

Essentially during ovulation, the ovary grows the egg. Once the egg has matured, it leaves the ovary and travels down the fallopian tube to the uterus.

Three Phases of Ovulation

Let’s break ovulation down into its three phases: periovulatory, ovulatory, and postovulatory.

Periovulatory Phase

During this phase, the hypothalamus signals to the pituitary gland to make FSH (as we mentioned earlier). In case you didn’t know, FSH helps mature the egg in the ovary for possible fertilization. It also is responsible for producing estrogen. Also, during this phase, the mucus increases around the ovum (fancy way of saying “egg cell”). And your uterus gets thicker.

Ovulatory Phase

This is the phase where LH is produced, signaling the mature egg to be released. The egg leaves the follicle via a hole made by enzymes. It then makes its way down the fallopian tube. This is when you are the most fertile, for roughly 24-48 hours. In order for conception to occur, the sperm has about 12-24 hours to fertilize the egg.

Postovulatory Phase

LH is secreted. And the egg stays in the fallopian tube for a maximum of 24 hours. If by then the egg is fertilized, it goes to the womb. If not, the hormones stop secreting. And the uterine lining breaks down, preparing to leave the body along with the unfertilized egg during your period.

What Is the Best Ovulation Kit for You?

Of course, there is no one-size-fits-all ovulation kit, just as there’s no “one type of woman.” It really depends on your goals, needs, and price point. With that in mind, here are two of the top ovulation kits on the market.

KNOWHEN Advanced Saliva Ovulation Test Kit

Unlike a lot of the ovulation kits that use urine samples, this ovulation kit reads ovulation results from your saliva!

How It Works

Before you brush your teeth or eat breakfast, put a drop of saliva on the microscope lens.

Once the saliva has dried, you can read the results, which are based on the saliva pattern.

The more saline the saliva, the higher levels of estrogen are in your body, which is an indicator of ovulation.

The following instructional video shows you how to register the app, use the kit, and interpret the results.


If the saliva has dried in a dotted pattern, you’re not ovulating. You’re at your least fertile phase, so don’t expect that pregnancy stick to read positive. If the saliva has created little “fern-like” patterns, you’re either at the beginning or ending phase of ovulation (otherwise periovulatory or postovulatory). Lastly, if you see a lot of fern-like patterns, you’re ovulating! This means you’re at your prime fertile time.


  • It can pinpoint your 5 most fertile days, so it may be the best ovulation kit for you if you want to become pregnant fast and seek immediate results.
  • It is FDA certified, which means it has met federal requirements.
  • This is one of the best ovulation kits because it has a 98.9% accuracy. Saliva helps make it that accurate.
  • According to OB-GYN Physician, Dr. Kecia Gaither, saliva is more accurate than urine. This is because with urine samples you have to factor in other chemicals.That's not the case with saliva.

  • Price point wise, the KNOWHEN ovulation kit comes in around $50. And it's reusable. This makes it one of the best ovulation kits when it comes to price.


  • This is not the best ovulation kit for obese women or women with polycystic ovary syndrome (PCOS), as the results won't be dependable.

Ava Bracelet

In 2016, Ava released one of the latest ovulation kits, or more precisely ovulation bracelet. Regarded as the “fertility FitBit,” the Ava bracelet uses sensor technology to record data from 9 different parameters (i.e. body temperature, heart rate variability, and resting pulse rate being some of them). It then inputs the data into the algorithm designed to predict your five most fertile days.

How It Works

When you go to bed, put on the Ava bracelet. The morning after, take it off and plug it in next to your iPhone or Android phone. Within seconds, it will sync to your phone and you'll know the results.


The Ava bracelet will let you know what your fertile days are. There’s no pattern-reading or color coding.


  • Like the KNOWHEN ovulation kit, the Ava bracelet is FDA approved.
  • Also, it too boasts a high accuracy rate.
  • According to an earlier year-long study done by the University Hospital of Zurich, this ovulation bracelet holds an 89% accuracy rate in predicting your 5 most fertile days. Although this is lower than the KNOWHEN ovulation rate, the Ava bracelet factors in 8 more parameters. Still, it needs to have more studies, as the sample size was just 41 women (a good sample size is at least 100 participants). The good news is more studies are underway.

  • Also, one of the reasons why this may be the best ovulation kit for you is that the Ava bracelet works for women who have regular and irregular periods.


  • Unfortunately, like the KNOWHEN ovulation kit, the Ava bracelet doesn't work for women with PCOS.
  • Also, this is more expensive than KNOWHEN, pricing at around $200.

Did this help? For more information about the best ovulation kit and conception advice, read our pregnancy blogs and feel free to drop a comment!



Karen Haines is a health writer based in Stellenbosch, South Africa. She has written for magazines, websites, trade journals, and consumer health publications. Follow Karen on twitter @karehaines Protection Status