Summarize this article in one sentence.
To breed French Bulldog puppies, you need to choose dogs that have a good health history, and who have characteristics you would like to pass onto puppies. Think about physical characteristics, like size and color, along with other qualities like temperament and personality.  Make sure the male and female dog aren't closely related. Have both dogs genetically tested and tested for infectious diseases like Brucellosis so you know they're healthy before you breed them. Typically, a bitch will start ovulating about 5 days into her cycle, once she has started spotting. You’ll notice a bit of blood and irritability to indicate the beginning of her fertile period. At this point, you can take your female to the vet for tests to confirm that she’s ovulating before you place her with the male for mating. When you have confirmation that your bitch is ovulating, place her in the same room as your stud. It’s best to put one hand on the female’s collar and the other under her ribcage to help steady her while the male mounts her. Make sure to supervise the mating session closely to prevent any aggressive outbursts.  If either dog shows signs of aggression, it’s best to keep them both on leashes during the mating session. That way you can pull them apart and control their interaction better to prevent injury. During intercourse, the stud’s penis will enlarge while it is inside the female. This leads to a situation in which the penis gets “stuck” inside the female and the male dog will typically turn around so that it appears the two dogs are stuck butt-to-butt. This is completely normal and typically lasts around 20 minutes. You can request veterinarian assistance with artificially inseminating your bitch, rather than actually mating the two dogs. This method can be much easier on the female, so it is often the method of choice for veteran breeders.  If you’re comfortable doing it yourself, you can try collecting the semen from the stud’s distended penis and dripping it into the bitch’s vagina with a clean dropper. Keep the female on her back with her hips slightly elevated to help ensure conception. Don't try to perform this yourself unless you've been trained or you could hurt the dogs or cause an infection.

Summary:
Choose dogs with good breeding histories. Track your bitch’s ovulation cycle. Put the dogs together when the bitch is ovulating. Get help from your vet for artificial insemination instead of physically breeding the dogs.