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Unlike what happens in other mammals, the dog’s ejaculation doesn’t occur until after penetration into the vagina and the greatly enlarged glands of the penis is held firmly in place by the contractor muscles of the vagina.
Normally the tie lasts from 5 to 30 minutes, and the time has no particular significance or influence on conception or on the number of puppies that result. Any time over 30 minutes is abnormal; if it is more than 45 minutes, a veterinarian should be consulted.
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