No more "timing trouble."

Visually tracking your body's rhythm with data
Fertility support device
kegg

General Medical Device | Used by over 100,000 people in the US

Do you have these problems?

I don't know my ovulation day,
and I'm not confident about the timing.

Even with basal body temperature and test strips,
I don't feel like it's real.

Feeling burdened by fertility treatments that rely on medical institutions

Irregular periods,
uncertainty about predictions

Crowdfunding
Underway!

Turn indecision into progress.
This special price is only available now.

12

DAYS

12

HOURS

12

MINUTES

12

SECONDS

The fastest way to get it is here!

Fertility Support Device (At-home cervical mucus tester)

A new habit to track changes before ovulation

kegg measures changes in cervical mucus (a part of vaginal discharge) and visualizes daily conditions and trends clearly within the app. By capturing your body's rhythm as data rather than just an vague feeling, it helps you notice previously unnoticed trends in your cycle. Daily tracking provides clues to understanding your rhythm and can be used as a reference when considering your most fertile window.
This is a home-use device that has been registered as a general medical device in Japan. It uses medical-grade silicone and comes with a Japanese app and instruction manual, making it safe and easy for first-time users. Furthermore, it has a proven track record, having been used by over 100,000 people in the United States, demonstrating its popularity.
通常価格 ₩457,000
通常価格 セール価格 ₩457,000
Save
/
  • Supporting proactive fertility treatments
  • One-time purchase, no subscription required
  • In stock, ready to ship
  • Backordered, shipping soon
(税込) 配送料とクーポンはチェックアウト時に反映されます / Shipping calculated at checkout.



















                                  







Materials/Ingredients: Medical-grade silicone
Country of Origin: USA (design) / Taiwan (manufacturing)

・This product is a general medical device that provides reference information for predicting and managing the menstrual cycle.
・It is not intended for the diagnosis of pregnancy, identification of ovulation, or treatment.
・Please refer to the enclosed document for instructions and precautions.
・If you have any concerns about your health or physical condition, please consult a medical institution.

This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.

Kegg from a Specialist's Perspective

よくある質問

Move beyond "just guessing" in your fertility journey. kegg is a general medical device that measures vaginal changes in about 90 seconds daily, visualizing your body's rhythms as data.
It's a new option that allows you to understand your fertility journey, which previously relied on feelings and intuition, through objective data on "changes in your own body."

Yes, it has been registered in Japan as a general medical device. It is designed for safe daily use.
(Registration number: 13B2X10428006001)

Chosen by those who have even the slightest concern about their current method.
- Those who have just started fertility treatments
- Those who feel limited by basal body temperature and ovulation predictor kits
- Those for whom clinic visits are a burden
- Those who want to thoroughly understand their own bodies

Basal body temperature monitors changes "after" ovulation, while kegg measures the changes in your body leading up to ovulation.

This allows you to grasp trends earlier, a key feature that helps you plan your timing proactively.

This is because it captures the natural changes in your body as data. By measuring the vaginal environment and graphing it on the app, you can use it as "one indicator" to understand your fertile window.
Additionally, the memo function allows you to record test results, supplements taken, menstruation, and whether or not you've had intercourse, enabling you to review the changes in your body and your lifestyle habits all at once.

Demonstrations are also progressing in Japan. Its utility as an indicator for ovulation timing has been examined in fertility treatment settings, including validations at Hamada Hospital in Tokyo and its use in demonstration projects by the Ministry of Economy, Trade and Industry.

By consistently measuring for approximately 90 seconds a day, the device learns your body's rhythm and improves its accuracy.
On average, it is said that your personal trends become visible after 2 to 3 cycles.

It takes just 90 seconds a day. Simply insert the egg-shaped device (approx. 50mm long / 25mm max diameter) into the vagina, take a measurement, remove it, and check the results on the app. The tail part can remain outside, allowing you to measure while doing other things, such as brushing your teeth or blow-drying your hair.

It's okay if it's not perfect. Ideally, it should be around the same time (±2 hours), but even if it's slightly off, data will still accumulate. The key to results is to continue without overexerting yourself.

Do not use during menstruation; resume after menstruation ends. It is designed to be continued without overexertion.

It is designed for safe and comfortable use. Made of soft medical-grade silicone, there is no need to insert it too far. Many users in Japan have reported "less discomfort than expected," and it can be washed and reused, ensuring good hygiene.

No daily charging is required. The app will notify you at the right time, making it easy to continue.

Yes, it supports Japanese and is intuitive to operate. Measurement results are clearly displayed in graphs.

Testimonial from the US

My partner researched and purchased this product.

It deepened my understanding of my cycle and provided guidance on timing.

Female, 20s
Unexplained infertility

It didn't go well for two years,

but using kegg made me realize the timing discrepancy.

Woman in her 30s
Trying for a second baby

By helping men understand the situation, too,

I feel it has become easier to work together with my partner.

Woman in her 20s
Male infertility

Lady Technology