Support couples trying to conceive
Gives patients a practical way to identify the fertile window and time intercourse around likely ovulation.
IVD / Fertility
LH Ovulation Rapid Test Cassette
Fast urine-based LH surge detection to help clinics, pharmacies, and patients identify the most fertile days of the cycle.
SKU WSLH100225 tests / boxSelf-testing / IVD
Product Overview
Simple ovulation prediction for fertility timing support.
The LH Ovulation Rapid Test Cassette is a one-step immunochromatographic assay for qualitative detection of human luteinizing hormone in urine. It detects LH at or above 25 mIU/mL and helps predict ovulation before it occurs.
>99%Clinical accuracy
25 mIU/mLLH threshold
3-5 minRead time
25Tests per box
Medical Background
Why LH testing matters
LH is secreted by the anterior pituitary and rises sharply before ovulation. This mid-cycle LH surge triggers final oocyte maturation and follicular rupture, with ovulation usually expected within 24-48 hours after peak LH.
Before ovulationUrinary LH testing identifies the fertile window prospectively, unlike basal body temperature charting, which confirms ovulation retrospectively.
Clinical counselingA positive result gives providers a simple way to explain timing intercourse during the most fertile period.
When no surge appearsRepeated negative cycles may suggest anovulation or irregular hormonal patterns that need medical review.
LH profile in a typical 28-day cycle
The test is calibrated to WHO 2nd IS 80/552 and is designed to detect the LH surge while avoiding baseline fluctuations.
Provider Value
What the kit helps clinics and pharmacies do
Reduce uncertainty around cycle timing
Useful when patients are unsure which days matter most, especially when cycle length varies month to month.
Create repeat-use counseling value
The 25-test box supports repeated cycle monitoring and gives providers a recurring fertility counseling tool.
Procedure & Results
How to use and interpret the cassette
1Collect urine
Use a clean dry container. Test between 10:00 AM and 8:00 PM. Avoid first morning urine and reduce liquid intake for 2 hours before testing.
2Add sample
Bring cassette and urine to 20-30 C. Add 3 full drops into the sample well marked S.
3Wait
Start the timer and allow colored lines to develop.
4Read
Interpret at 3-5 minutes. Do not read after 10 minutes.
Positive
TC
T line equal to or darker than C line. LH surge detected; ovulation is expected within 24-48 hours.
Negative
TC
Only C line appears, or T line is lighter than C. No surge detected; test again tomorrow at the same time.
Invalid
TC
No control line appears. Repeat with a new cassette. If the problem persists, stop using that lot and contact the distributor.
Counseling Guide
What providers should explain
When to startFor a 28-day cycle, begin testing on day 12. Test once daily for 5 days or until the surge is detected.
If cycles varyUse the average cycle length from the last 3 cycles. If cycle length is below 21 days or above 40 days, advise medical consultation.
After a positive resultExplain that ovulation is predicted, not confirmed, and that the next 24-48 hours are the key timing window.
Appropriate useNot for contraception and not a pregnancy test. PCOS, POI, perimenopause, hCG/LH medicines, clomiphene, and menotropins may affect reliability.
Start-day guide
| Cycle length | Start | Cycle length | Start |
|---|---|---|---|
| 21 | Day 5 | 31 | Day 15 |
| 22 | Day 6 | 32 | Day 16 |
| 23 | Day 7 | 33 | Day 17 |
| 24 | Day 8 | 34 | Day 18 |
| 25 | Day 9 | 35 | Day 19 |
| 26 | Day 10 | 36 | Day 20 |
| 27 | Day 11 | 37 | Day 21 |
| 28 | Day 12 | 38 | Day 22 |
| 29 | Day 13 | 39 | Day 23 |
| 30 | Day 14 | 40 | Day 24 |
Specifications
Product information from leaflet and IFU
Product nameLH Ovulation Rapid Test Cassette
SKU / formatWSLH1002, cassette, 25 tests per box
Intended useQualitative detection of human LH in urine to predict ovulation; self-testing and in vitro diagnostic use
MethodColloidal gold sandwich immunochromatographic assay
CutoffLH >= 25 mIU/mL, calibrated against WHO 2nd IS 80/552
SpecimenUrine
Read time3-5 minutes; do not read after 10 minutes
Storage4-30 C in sealed pouch; protect from sunlight, moisture, and heat
After openingUse within 1 hour
ComponentsCassette, dropper, desiccant; single use only
Quality claims>99% clinical accuracy; CE certified; ISO 13485 referenced in leaflet
Performance
Sensitivity at LH >= 25 mIU/mL. No interference from FSH at 200 mIU/mL or TSH at 250 uIU/mL. Common tested substances including acetaminophen, aspirin, ascorbic acid, caffeine, glucose, hemoglobin, bilirubin, ampicillin, and tetracycline showed no interference at evaluated levels.
Warnings
For in vitro diagnostic use only. Do not reuse. Do not use expired tests or damaged pouches. Do not touch the result-window membrane. Treat urine specimens as potentially infectious.
Limitations
Not for contraception and not a pregnancy test. A positive result predicts ovulation but does not confirm it. If pregnancy is not achieved after 3-4 months of timed use, consult a physician.