Progesterone Testing Cost, Timing, and How Often to Test
Progesterone testing is the foundation of precision breeding timing — the difference between hit-or-miss breeding dates and confident, data-driven breeding decisions. But the cost adds up across multiple tests per heat cycle, and many breeders undertest (missing the peak) or overtest (spending unnecessarily early). This guide gives you a practical schedule that balances accuracy with cost efficiency.
Why Progesterone Testing Matters
Dogs ovulate in a narrow window, but the ideal breeding window — when sperm can successfully fertilise mature eggs — is even narrower. Without progesterone data, breeders rely on external signs (vaginal discharge, behaviour, vulva softening) that are unreliable predictors of actual ovulation timing.
Progesterone testing measures the hormone that rises predictably before and around ovulation:
- Below 1–2 ng/mL: Anoestrus or early pro-oestrus — not near ovulation
- 1–2 ng/mL: LH surge occurring — ovulation 2 days away
- 5–8 ng/mL: Ovulation likely occurred or imminent
- Above 10 ng/mL: Post-ovulation — eggs maturing, breeding window opening
- 25–40+ ng/mL: Peak mid-luteal progesterone — well past optimal breeding window
When to Start Testing
For dams with regular cycles (every 6–8 months): Start testing on approximately day 5–7 of heat (where day 1 is the first day of bleeding). This catches the LH surge in most dogs without wasting money on early tests when values are near zero.
For dams with irregular cycles, first-time heats, or if shipping chilled semen: Start testing on day 3–5 to avoid missing an early ovulator. Some bitches ovulate as early as day 7–9 of heat.
For dams that have previously missed optimal timing: Start on day 3 and test frequently.
Testing Frequency Schedule
| Progesterone Level | Testing Frequency |
|---|---|
| Under 1 ng/mL | Every 3–4 days |
| 1–3 ng/mL | Every 2 days |
| 3–7 ng/mL | Every day or every other day |
| 7–15 ng/mL | Test once more to confirm peak, then breed |
| Over 15 ng/mL | Breeding window is open; test as needed to confirm timing |
Cost-Saving Tips Without Compromising Accuracy
In-clinic quantitative testing costs $50–$150 per test depending on your clinic and location. Plan for 3–6 tests per cycle in most cases.
Mail-in testing labs (like Reproductive Revolutions or similar services) offer lower per-test costs but require time for shipping — not suitable for fast-moving progesterone curves.
Discuss your budget with your vet. A reproductive vet can advise on which tests to prioritise given your breeding method. Fresh natural breeding is more forgiving of timing; frozen semen requires precision, and skimping on tests here costs much more in missed litters.