Know your body
The newest OvaCue Fertility Monitor represents a major advance for women looking to identify their complete fertile window. OvaCue works by measuring your electrolyte levels which change in concert with your ovulatory cycle. Now, with one simple handheld device, you can accurately measure your unique hormonal changes and visually track your cycle with an interactive calendar.
Safe & reliable
Zetek has been manufacturing and selling FDA approved fertility monitors for over 20 years. We have helped thousands of couples conceive. We provide personalized customer support—if needed, we'll track your cycles with you.
Easy to use
Simply place a spoon-sized sensor on your tongue for five seconds each morning and the OvaCue will automatically record your fertility for the day. The OvaCue tracks the readings in memory and indicates your most fertile days graphically on a calendar.
Accurate
Zetek’s Electrolyte Method™ has been proven to be 98.3% accurate at monitoring ovulation in numerous studies, including those sponsored by the National Institutes of Health and published in peer-reviewed journal articles.
Convenient
The OvaCue requires no urine sampling and can be used for many years with no additional purchases required. The OvaCue comes complete with the base unit, sealed oral sensor, carrying case, owner’s manual, battery and a free pregnancy test.
Timing is everything
Having advance notice gives you the ability to time intercourse before ovulation, which is the only way to conceive.
Advance notice of ovulation
About a week before ovulation, your body begins giving signs that you are beginning to be fertile. OvaCue detects these signs up to 7 days before ovulation.
Accurate prediction of peak fertility
Sperm must be waiting when the egg is released, as intercourse timed in advance of ovulation is the only way you can conceive a baby. However, advance notice is only half of what you need to plan intercourse. Since the window for successful fertilization can be as short as a day or less, you also need accurate prediction as the time of ovulation draws close. Some fertility monitors give lengthy notice, but also give “false positives” eight or more days in advance and may continue giving false positives even after ovulation has occurred.
Since you cannot conceive after you have ovulated, successfully timing conception depends on the accuracy of your fertility monitor. Only the OvaCue Fertility Monitor gives you sufficient notice and marks your complete fertile window (with use of the optional vaginal sensor) with virtually no false positive readings—98.3% accurate in NIH-supported testing.
Using the OvaCue
Using the OvaCue is simple. Starting on day two of your cycle, just put the spoon-sized sensor on your tongue for three seconds first thing each morning. The OvaCue takes your electrolyte reading and automatically computes:
- Your current cycle day
- Fertility status for today (darker colors equal higher fertility)
- Peak fertility days (your best chance to conceive)
- When ovulation occurred (with optional vaginal sensor)
- Start and end of fertile window (when you can conceive)
The OvaCue tracks your readings in memory and indicates your most fertile period, beginning five to seven days before ovulation until ovulation occurs.
Interpreting the your personal Ovulation Calendar
- days of lowest fertility
- days of increasing fertility
- days of highest fertility. Have intercourse every day
- ovulation confirmed (requires vaginal sensor; marks end of fertile period)
OvaCue’s reliability takes the guesswork and the stress out of identifying your most fertile time. You can plan your activities well in advance for the best chance of conception.
The OvaCue tracks your hormonal changes and maintains a record for four months running. You can review your readings or add new readings with a simple touch of a button. You can also download the information to a Windows computer and use the OvaGraph software to track your cycles over your entire fertile lifetime.
If you want to confirm the time of your ovulation every month and mark the end of your fertile window, you will want to use the optional vaginal sensor.
Couples who are ready to be pregnant should plan for intercourse the day OvaCue defines as your most fertile day. Remember, you must have intercourse before ovulation to conceive. If your menstrual period does not begin within two or three weeks, a pregnancy test may be in order.
How do I use the OvaCue fertility monitor?
Just put a spoon-sized sensor on your tongue for three seconds each
morning. The OvaCue ® does the rest?
The OvaCue is a sophisticated electronic device, but it couldn't be
easier to use. You simply put a spoon-sized sensor on your tongue for
three seconds each morning. The OvaCue does the rest!
A simple menu gives you access to full knowledge of your fertility.
If you would like to know your fertility status for the current day or
the most fertile days of your current cycle, just select the "Calculate
Fertility" option. With the 5 to 7 days advance notice the OvaCue provides,
you can begin to "plan your miracle."
How to confirm ovulation
You can also use the OvaCue to confirm ovulation by using the optional
vaginal sensor, which measures changes in the electrolytes directly from
the reproductive tract. You simply connect the vaginal sensor (about
the size of a tampon) to the handheld unit and take a five-second reading
each day during your most fertile period.
The handheld computer tracks your hormonal changes and maintains a record
for four months running. You can review your readings or add new readings
with a simple touch of a button. You can also download the information
to another computer and use the OvaGraph software to chart your cycles
from now on.
Couples who are ready to be pregnant should plan for intercourse the
day the Cue Peak is identified and every other day after that until ovulation
is confirmed. If your menstrual period does not begin within two or three
weeks, a pregnancy test may be in order.
You're not alone
Detailed instructions explaining how to use the OvaCue are in the Owner's
Manual that is included with each cue. If you have any questions or need
help understanding your readings and what they mean, you can always call
Zetek at 1-800-FOR-CUES. Zetek has experienced staff available M-F from
8-5pm MST, who are happy to assist you in your family planning.
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The OvaCue ® ovulation computer tracks your cycles electronically
for four months running. No need to keep charts by hand?
Keeping charts and graphs for tracking
cycles and predicting ovulation is no longer necessary.
The OvaCue Fertility Monitor measures daily changes in the electrolytes
in your saliva. It stores your cycle data in memory and predicts and
confirms ovulation automatically.
The ovulation calculators on many popular web sites are typically crude
tools that tell you what you already know. OvaCue measures the hormonal
changes that presage ovulation. Used daily, it learns your patterns and
reports when you are likely to be most fertile.
What if I like keeping a record?
For those who like to keep a written record, you can still keep one
yourself using the Cue Charts and guidelines found below. Alternatively,
install OvaGraph software on your Windows-based PC and begin to download
your cycle data to your computer. Track your personal cycle
data for a lifetime, if you wish, and graph it to your heart's content.
In brief, the user plots a numeric reading on a Cue chart each day.
About a week before ovulation, electrolytes such as sodium and potassium
appear in elevated amounts in the saliva. It is this Cue Peak on
the graph that announces the beginning of the ovulatory process.

A few days after the Cue Peak, the luteinizing hormone
(LH) in the blood increases and decreases very sharply over a period
of 24 hours (the LH peak). As LH reaches its peak in the blood, there
is a definite change in the reproductive tract which can be measured
by the Cue vaginal sensor. Mucus secretion increases, and the electrolyte
content of the mucus changes. This change causes a sharp, clear drop
and increase in these readings. It is this nadir that the Cue uses to
confirm ovulation.
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How does the OvaCue System work?
OvaCue ® Fertility Monitor provides up to 7 days notice of ovulation?with
98% accuracy.
The OvaCue ® Fertility Monitor uses Zetek's exclusive Electrolyte
Method, the best method available for ovulation prediction and detection.
OvaCue measures the mix of electrolytes in your saliva. It stores and
processes this information to precisely define your time of peak fertility.
The OvaCue is essentially a handheld ovulation computer. A press of
a button tells you your fertility status for the day and on what day
you can expect to be most fertile.
Ovulation prediction basics
Your body prepares for ovulation with complex changes in the output
of hormones. About a week before ovulation, a threshold of increasing
amounts of estrogen is reached. At this time, one ovum is selected from
among the many available in either of the two ovaries. This one ovum
begins to grow and the uterus begins to be prepared to receive a possibly
fertilized egg.
At the same time, other hormones are changing the amounts of minerals
like sodium and potassium (electrolytes) that are kept or discarded by
the body. This is what produces the Cue Peak , a high point in the salivary
readings of electrolytes.
The OvaCue stores this information about your body and uses the patterns
to accurately predict your time of ovulation.

Optional vaginal sensor to confirm ovulation
Most of our customers also purchase the optional vaginal sensor, which
measures similar electrolytic changes in the reproductive system. While
not required for predicting ovulation, the vaginal sensor allows you
to confirm the onset and end of ovulation.
Tested and proven
The OvaCue is a patented device that has been proven, in a National
Institutes of Health funded study, to accurately predict ovulation in
98% of cycles tested. OvaCue has been recommended by doctors and has
helped hundreds of couples conceive. The OvaCue is safe, reliable, and
portable and has been approved for use as an aid to conception by the
FDA and the Vatican.
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OvaCue Fertility Monitor ® is the only practical
method that both predicts and confirms ovulation.
Timing and accuracy are linked
True advance notice depends on the accuracy of the method. Only OvaCue
gives you sufficient notice with virtually no false positive readings:

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Practicality and value
You have probably studied various methods of increasing your chances
of conception. Perhaps you have tried many of them. If so, here is what
you've found:
Ultrasound: Nothing beats ultrasound for precisely
determining the time of release of the ovum. The problem is that ultrasound
cannot predict ovulation, only confirm it. Therefore, unless you are
being scanned several times a day, you are unlikely to receive confirmation
in time to do anything about it. While useful in a medical context to
establish whether you are indeed ovulating, ultrasound is expensive and
impractical for planning conception.
Blood serum LH: Measuring LH in the blood is an excellent
method for predicting ovulation in a medical context. It can give several
hours notice of ovulation, allowing a reasonable amount of time for deposition
of semen. However, the necessity of frequent blood sampling makes it
expensive and inappropriate for home use.
Urine LH sticks: After LH has peaked in the blood,
it eventually makes its way into the urine and can be measured by a urine
LH stick. The problem is, that by the time LH makes it to the urine,
it is usually too late for sperm to be deposited in time to reach the
egg while it is still viable, even if intercourse or AI occurs immediately.
Not only does this method often provide insufficient advance notice,
but frequent urine samples are required and stick color changes are not
always easily interpreted. In addition, in Zetek's NIH Phase II study,
using various urine LH tests, a positive reading was not reached at all
in 24% of the cycles we tested.
Temperature: You can't beat the price, but measuring
basal body temperature (BBT) is useful only for confirming that ovulation
has occurred. Again, it's too late. At best, you can establish a pattern
to your cycles and hope to guess correctly next month.
Ferning microscopes: Makers of these tools have picked
up on the fact that salivary characteristics can indicate the onset of
ovulation. However, the accuracy of these products is dependent on the
user's ability to interpret the results. In addition, extraneous factors
such as stress?and even the process of collecting saliva itself?can distort
the results.
OvaCue vs ClearPlan.
Simply speaking, OvaCue's Electrolyte Method? is more
accurate , and therefore provides better guidance
for timing conception. According to the ClearPlan Physician's
Manual, its positive signal falls outside the fertile
period in over a quarter of the cycles tested.
In addition, many women find the daily handling of urine
samples to be undesirable. And then there are those
test sticks to buy. And buy. And buy... |
Method comparison summary
|
OvaCue
w / vaginal monitor |
Clearplan Easy |
BBT |
Home urine LH kit |
Serum LH Assay |
Ultrasound |
Predicts ovulation |
Yes
5-7 days |
Yes
1-5 days |
No |
Yes
0-24 hours |
Yes
36 hours |
No |
Defines complete window of fertility 2 |
Yes |
? |
No |
No |
No |
No |
Accuracy |
98% |
72% |
? |
94% |
~100% |
~100% |
Confirms Ovulation? |
Yes |
No |
Yes |
No |
No |
Yes |
Home use? |
Yes |
Yes |
Yes |
Yes |
No |
No |
Monthly cost 4 |
$40 - OvaCue |
$30-44 |
-- |
$25 |
~$75 per test |
$125-225 per test |
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Ovulation Science, the Electrolyte Method and Ovacue
Patented method -- Proven results
In studies overseen by the National Institutes of Health, Ovacue products
using Zetek's patented Electrolyte Method? have been shown to predict
ovulation with 98% accuracy.
You need advance notice
Release of the ovum or egg is called ovulation. Once the egg is released
from the ovary and matures in the fallopian tubes, it will survive and
be able to be fertilized for a very short time, at most about 24 hours
and as a little as 8 hours. The other half of the conception process
is the spermatozoa (sperm). Healthy sperm can fertilize an egg for about
48 hours or more after their deposit in the woman. Sperm requires up
to 24 hours to reach the egg.
It takes a woman's body several days to prepare for ovulation. This
process is managed by complex interaction of hormones. About a week before
ovulation, a threshold of increasing amounts of the hormone estrogen
is reached. At this time, one ovum is selected from among the many available
in either of the two ovaries. This one ovum begins to grow and the uterus
begins to be prepared to receive a possibly fertilized egg.
At the same time, other hormones are changing the amounts of minerals
like sodium and potassium (electrolytes) that are kept or discarded by
the body. This is what produces the Cue Peak , a high point in the Cue
salivary readings of electrolytes.
Why salivary electrolyte readings are better than urine LH
A few days after the Cue Peak, the luteinizing hormone (LH) in the blood
increases and decreases very sharply over a period of 24 hours (the LH
peak). LH is the hormone that triggers the release of the ovum from the
ovary. The egg is released within 24 hours after the LH is at its highest
in the blood.
Some time (as much as 12 hours) after the peak of LH in the blood, LH
is also present in the urine. It is this increasing concentration of
urine LH that can be detected by the different brands of urine-based
ovulation predictors . Prediction using this method depends on the exact
relationships between the time of the highest blood LH, the time the
urine stick begins to see the LH, and the time of the measurement. At
best, the time between the urine signal and actual ovulation cannot be
more than 24 hours in advance. At worst, it is seen only after ovulation
has already occurred, offering no chance of conception for the current
cycle.
Buy OvaCue |