What each method is for
LH strips
- What it measures
- Luteinizing hormone in urine. Clearblue’s Advanced Digital Ovulation Test detects LH and estrogen. Premom sells quantitative LH strips and reads photos of them.
- Timing the company describes
- Clearblue’s touch-screen monitor shows Low, High, or Peak from estrogen and LH for people trying to conceive. That is a fertile-window signal from the test, not a statement that ovulation already happened.
- Limit the listing states
- Premom says a line on a strip is not proof you ovulated, and that a photo can be wrong if the lighting or timing is off.
- Listings
- ClearbluePremom
PdG tests
- What it measures
- PdG, a urine metabolite of progesterone, as named by Inito, Mira’s Ultra4 wands, and Oova. Proov’s homepage discusses progesterone and names PdG.
- Timing the company describes
- Inito says a rise in PdG is how it tries to show that ovulation already happened, rather than only predicting it.
- Limit the listing states
- Proov says its PdG test is FDA-cleared to help confirm ovulation, and the listing says a clearance is not a personal diagnosis. A strip does not tell you how to treat a result.
- Listings
- ProovInitoMiraOova
Basal body temperature
- What it measures
- Temperature. Tempdrop’s sensor records basal body temperature during sleep. Natural Cycles says it uses temperature to label fertile and non-fertile days. Flo says a free account can log basal body temperature. None of those three describe a urine hormone sensor for this signal.
- Timing the company describes
- Tempdrop describes a temperature rise after ovulation, when progesterone is dominant. That shift is retrospective on the chart.
- Limit the listing states
- Tempdrop says temperature-only methods can miss ovulation, and that many charting methods also record cervical fluid. Natural Cycles’ birth-control wording, including 93% typical use and 98% perfect use, is on that listing. It is not a claim about a thermometer by itself.
- Listings
- TempdropNatural CyclesFlo
A reading is one data point
The fertility department says a test result is one data point and does not tell you whether you will conceive. Take a result you do not understand to your own clinician. This page is not medical advice.
When a monitor reads more than one hormone
Mira, Inito, and Oova each name more than one urine hormone on their own pages. The side-by-side of hardware, hormones, and printed prices is onfertility monitors. Strips, apps, and wearables are onovulation trackers. The department is Fertility & ovulation.