It doesn’t necessarily mean that your bitch will accept male. There are several factors responsible for this, first timers could be rejecting stud, also seeing ferns now doesn’t mean she is in prime ovulation you need to study the fern pattern so we say you test daily and breed on average of 3 to 4 days after seeing the first ferning pattern, also we have dominant bitches even when they are ovulating they Will still refuse to accept males, we also have cases where by blood chances in color to strawberry and still not ready, we have cases also of standing bitches that accepts male all through even when not ovulating, atime what happens in the body of your bitch as per her result of Ovulation microscope testing or other ovulation testing will tell you to breed her but her external or physical signs opposes the results obtained internally, so you must understand the working principle of the OM and behavior of dogs as it could be challenging as it varies from bitch to bitch….