kegg Review: A Reusable Fertility Tracker That Reads Cervical Fluid, Plus Pelvic Floor Training

How kegg works

kegg uses impedance sensing, measuring how easily a tiny electrical signal passes through the fluid in the vaginal environment. Fertile cervical fluid has a different electrolyte composition from non-fertile fluid, so changes in those readings track the shift toward ovulation.

Each day you insert the device for a reading of about two minutes, and it syncs to the app automatically. The app shows a Fertility and Cervical Mucus Score, an ovulation probability and trends across cycles. Over time it learns your pattern and highlights a fertile window of roughly two days. Because it picks up the changes before ovulation, it can help you time intercourse rather than simply confirming ovulation afterward.

What you get for the price

kegg's headline price is high, but there are no ongoing costs. At the time of our research, the tracker was listed at a sale price of about $279, down from a list price of $477, and other recent sources reported a similar discount from around $467 to about $269. Recent offers have bundled a pregnancy guarantee, a conception program and free shipping.

For comparison, people using LH strips every cycle for six months or more can spend a meaningful amount, so the gap narrows if you expect to try for a while or want to use kegg across several pregnancies. kegg accepts HSA and FSA payments and offers buy-now-pay-later options.

About the pregnancy guarantee

kegg has offered a refund if you do not conceive within a set period of use, recently six months, subject to terms and conditions. The details have varied between promotions, so read the current terms carefully before relying on it.

Using kegg well

• Be consistent: take your reading at the same time each day, ideally within the window the app recommends.
• Start early in your cycle: daily readings in the run-up to ovulation give the app the contrast it needs.
• Combine signals if you like: some people pair kegg with LH strips or a temperature-tracking wearable during the first few cycles to cross-check.
• Clean it properly: wash the silicone device after each use according to the instructions.

Expect the first cycle or two to feel like a learning period while the app gathers data. Results become more useful once you have a few cycles of history.

The pelvic floor bonus

kegg's shape means it can double as a kegel trainer, and the brand says many users keep using it for pelvic floor exercises after the trying-to-conceive phase. A strong pelvic floor can help with bladder control and recovery after childbirth, so this is a genuinely useful second purpose. If you have pelvic pain or significant postpartum symptoms, a pelvic floor physical therapist can guide you on the right exercises.

Who kegg suits

kegg is a good fit for people actively trying to conceive with reasonably regular cycles who want more insight than a calendar app, find temperature tracking or strips frustrating, or want a single purchase rather than ongoing costs. It also appeals to anyone who values privacy and wants their data in one app.

It is less suitable if your cycles are highly irregular, if you have conditions such as PCOS that make fertility signals harder to read, or if you are uncomfortable with an internal device. It is not a contraceptive and should not be used to avoid pregnancy. kegg is registered with the FDA as a Class I device, which is not the same as clearance for diagnosis, and the brand ships within the US.

When to see a specialist

If you are under 35 and have been trying for a year, or over 35 and trying for six months, book a fertility evaluation rather than relying on tracking alone.

kegg compared with other tracking methods

• Calendar apps: free and easy, but they estimate ovulation from past cycle lengths and can be well off if your cycle varies.
• LH ovulation strips: affordable and widely available, detecting the hormone surge a day or so before ovulation. The ongoing cost and daily urine tests put some people off.
• Basal body temperature: confirms that ovulation has already happened, which is useful for learning your pattern but less helpful for timing within the current cycle. Wearables have made it far easier.
• kegg: reads cervical fluid changes that appear before ovulation, with no recurring cost, but requires an internal reading each day and a larger upfront spend.

Many people combine methods. Using kegg alongside LH strips or a temperature-tracking wearable for the first few cycles can give you extra confidence in what the app is showing you.

Our verdict

kegg is an innovative, well-designed alternative to strips and thermometers, and its ability to spot fertile cervical fluid before ovulation is genuinely helpful for timing. The upfront cost is steep and the guarantee terms can shift between promotions, but there are no recurring fees and the pelvic floor function adds lasting value. For people with fairly regular cycles who want a reusable, data-rich tool, it is worth considering.

kegg products at a glance

Prices as listed on the brand's site at the time of our research and may change. Check the store for current pricing.

kegg FAQs

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