Updated On September 23rd, 2025
Pet's info: Dog | English Toy Spaniel | Female | unspayed | 7 years and 7 months old | 18 lbs
progesterone is 63 .3 what is the breeding window SHE IS ONLY 4 DAYS INTO SEASON
1 Answer
Published on September 21st, 2017
Ovulation typically occurs when progesterone blood levels reach 5-6ng/ml. If Sadie is at 63.3ng/ml, she should be bred immediately IF she is receptive. If she isn't, you may need to wait until her next cycle to breed her. Given her age however, this would not be recommended.
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