Canine Progesterone Timing, Made Clearer for Serious Breeders
Use your latest progesterone result to estimate the likely LH surge, ovulation window, fertile breeding days, retest timing, and projected whelping range — with method-specific guidance for natural breeding, fresh AI, chilled semen, and frozen semen.
Designed for breeders who want cleaner records, better timing decisions, and a more professional breeding workflow.
A Breeding Planning Tool — Not a Guessing Chart
Most progesterone charts give breeders a flat number range and leave them to interpret the rest. This tool is designed to be more practical. It looks at the progesterone value, the date and time of the blood draw, the breeding method, and the trend across multiple results when available.
It helps breeders see where the bitch may be in the cycle, when to retest, when the fertile window may be opening, and how timing changes depending on whether the breeding is natural, fresh AI, chilled semen, or frozen semen.
Serial Result Tracking
Enter one result or build a full cycle record as new progesterone numbers come in.
Method-Specific Guidance
Natural breeding, fresh AI, chilled semen, and frozen semen require different timing decisions.
Exportable Breeder Records
Copy, download, print, or export CSV records for your breeding file.
How to Use the Predictor
Step 1: Set up the cycle
Step 2: Enter the progesterone result
Enter the dam, stud, breed or cross, heat start date, analyzer, and breeding method.
Type the progesterone number exactly as reported by the clinic. Choose ng/mL or nmol/L.
Step 3: Review the timing plan
The tool will estimate the current stage, retest timing, likely LH/ovulation timing, fertile window, and projected whelping range.
Step 4: Save your records
Download the plan, export CSV results, print the report, or save the cycle in the browser.
Use This Tool Responsibly
This predictor is a breeder planning aid. It does not replace veterinary reproductive guidance. Progesterone timing is strongest when results are interpreted serially using the same lab or analyzer whenever possible.
Frozen semen, chilled semen, infertility cases, unusual cycles, suspected split heats, illness, or high-value breedings should be managed with a reproduction veterinarian.
Important
Frozen semen has the narrowest timing margin. Do not schedule frozen insemination based on this tool alone. Use veterinary timing confirmation.
More Confident Frozen Timing
A breeder using frozen semen began logging serial progesterone results and timing recommendations. With clearer windows and vet confirmation, they reported feeling more confident about when to schedule insemination.
Success Stories From Breeders
These examples show how breeders are using progesterone timing more deliberately as part of a structured breeding workflow.
Cleaner Records Across Litters
A small program started saving and exporting cycle reports for each bitch. Over time, they built a record set that made it easier to compare cycles, plan repeats, and discuss outcomes with their repro vet.
Better Buyer Communication
Another breeder used the timing plans and notes to explain breeding decisions to puppy buyers. This helped set expectations and showed that timing was handled with intention, not guesswork.
Is this tool a guarantee of ideal timing?
No. It is a structured planning aid, not a guarantee. Final timing decisions should always be made with your veterinarian or reproductive specialist.
Can I use this without working with a vet?
It’s designed to support breeders who are already working with a vet or repro specialist, not to replace clinical assessment or timing advice.
How many progesterone results do I need?
The tool can work from a single result, but serial results from the same lab or analyzer usually make the timing plan stronger.
Frequently Asked Questions
Does it work for frozen semen?
It can help you think through timing, but frozen semen has the narrowest margin. Frozen breedings should always be timed with veterinary confirmation.
Can I save or export my timing plans?
Yes. You can save cycles in the browser and export or download reports so they can be kept with your breeding records.
Does this replace my own judgment?
No. It is meant to organize information and highlight likely windows. Your judgment, records, and veterinary guidance remain central.
Build a More Professional Breeding Program
Progesterone timing is one part of a larger breeding system. Moon & Manor resources are built to help breeders improve reproductive planning, puppy development, buyer education, nutrition decisions, and program documentation.