Please - speak English, if you can. Yes, maybe the Vet doesn't know what he's talking about if you think the puppies will have the exact same bloodline as the mother.
At any rate, for your education -
http://www.dogbreedinfo.com/breeding.htm:
" I am not even going to start hounding you about the millions of animals euthanized each year in shelters or that die on the streets. No one ever thinks this could happen to a litter they breed. I am going to tell you what makes a responsible breeder and the major effort that goes into ensuring the best, healthiest critters possible. Breeding is not just putting two cute dogs together and sixty-three days later you have cuddly pups. Responsible breeding requires work. It is not to be jumped into headfirst.
What a responsible breeder does:
Knows the breed standard. Each dog has a standard accepted by a kennel club that states what the ideal specimen of that breed should look like. It covers fur to teeth, color to structure. A dog not fitting the standard will not be considered for breeding. Also, they get out and show the dogs. Just because you think the dog may fit the standard does not mean it is a good breed representative. Only by having the dog evaluated many times can you truly get a feeling your dog is breeding material—this goes for males and females (what a dog show does as well as other competitions such as Schutzhund—I highly regard a dog who has achieved a SchIII—field trials, lure coursing, etc.). Even if a dog is top notch physically and meets the standard well, if it has temperament issues (shy, aggressive), it will not be bred. Many breeders also want to prove their dogs have brains to match the beauty. There are various sports that test a dog’s working ability. A dog should have both form and function.
Knows the pedigrees. Just because two dogs are great specimens does not mean they are compatible. Not all hereditary problems are a simple dominant/recessive gene thing. Some require a combination of multiple gene sequences before being expressed. So, two dogs could have parts of these sequences and if bred, the problem could be expressed though there is no sign in either dog’s background of the problem. Two great dogs also may not produce great puppies. A responsible breeder will research pedigrees and talk to other breeders to find the best possible matches. This can be a big undertaking. And just because a dog is winning all over the country does not mean he is the best. It may just mean he (or she) is being shown loads; chances are by a well-known handler, and everyone wants to breed to him (or get a pup from her). This dog may not be the best—just the most popular at the time. Do not be blinded by wins.
You also must know color inheritances. Some colors, like merles (blue or sable/red) should not be bred together. The merle gene, if doubled, can cause problems. Merle to merle breeding can be very bad.
Knows the dog. A responsible breeder will test dogs for things like hips, thyroid, eye problems (eye should be tested yearly on breeding stock) and whatever problems are common to your specific breed. If something is suspected, the dog is not bred. They also require testing for the dog they intend to breed with. There are also diseases such as brucellosis that can cause fetal abortion (miscarriage) in pregnant females—it is sexually transmitted—your dog must be clear of. Brucellosis does not always have outward symptoms, your dog could carry it and you’d never know. Your dog also must be current on all inoculations.
Accepts the risks. Breeding is not all happy. If you own a female, you must be willing to wait until she is physically mature to breed (about two years old). To breed too soon is like a teenage human having a child. They are not physically or emotionally ready. To breed too old is like a woman having her first child later in life. Males also must be at least two. You cannot get hips certified until they are two years old at least. Dogs of both genders must be fully mature and in top shape before breeding.
You must be willing to be in close contact with your vet from the moment of mating. There is so much that can happen and that you should know about. There are nutrition concerns—pregnancy and nursing are taxing on the female body. There are risk factors—some breeds are prone to birth complications and almost always require medical intervention. I remember hearing an English Bulldog breeder state 99.9% of all English Bulldogs litters are born by C-section due to the physiology of the breed. Even in a breed not prone to birth complications, they can arise and be costly! Many breeders will have their vet x-ray (radiograph) a pregnant female to get an idea of how many pups, their placement, etc. A big pup could get stuck in the birth canal. A retained pup (not born for some reason) can die and cause massive infection as it decays. A female may die during delivery. Are you willing to hand-rear a litter of pups? This is NOT easy and very tiring. What if your female has poor mothering instincts? Will you take over? Are you willing to accept that you could lose your dog and her puppies? What if one is born deformed or has a problem that shows up weeks down the road—then what? Are you willing to have you children see the miracle of death? I have only scratched the tip of the iceberg… "
I would also suspect that the people who buy "your" puppies are every bit as well educated in dog care as you are. It's called "Pits as Trophies," and it hurts the breed.