If you breed dogs, you absolutely need to remember this : the reproductive physiology in canines is unique (more info about this here).
Immatures eggs are ovulated during a 12-36 hours period.
And those eggs will require 55-72 hours to mature in the uterine tubes before they become fertilizable.
That is why performing a timing of ovulation is key to determine when to breed (everything you need to know about this right here)
However, knowing the day of ovulation is just one element you need to determine when to breed the bitch. What else do you need to know ?
Check the video below !
DR. EMMANUEL FONTAINE 