|WOW! So many questions, and so hard to believe so many owners of female dogs know so little! This is scary!
I refuse to pick on grammar issues, as I am not perfect.
On to the dogs. A female typically goes into her first heat anywhere from 8 - 12 months, with 8 months being a more common occurrence. A female bleeds usually only the first week of her heat. (please remember all dogs are different.) During the first week of her heat cycle, she will NOT stand for a male. By that I mean she wants nothing to do with the actual mating process. The second week of her cycle is when she will stand and allow a male to mount her and mate. Once again, not all dogs fit the common standards to a T! Some dogs have little to no bleeding, others have more.
The gestation period for a pregnant female is 60 days. If you see your female actually mating, and you KNOW she is in heat, please look at your calendars! Barring no unusual circumstances, she is most likely pregnant. Expect the puppies in approximately 60 days. Females will mate more than once during this one particular week. You can simply add 2 months to the week you SAW her actively mating. Expect the puppies 2 months from that week. I say this because it is possible that her first mating does not produce a pregnancy. Once again, she will mate for approximately one week. As I mentioned, occasionally females will have little or no bleeding. This occurs more often in younger puppies.
PLEASE do not even consider breeding your female if she is under a year old. Give her time to grow and develop. I cannot stress this enough! I strongly recommend 2 years as a perfect age to start breeding your female. Female dogs go into heat (after the first heat,) every 6 - 7 months, approximately 2 times a year. Those of you concerned with the bleeding issue, visit your pet store for the proper items for her to wear while in heat. There are little pants (they resemble diapers) and Velcro on the sides typically. There are sanitary napkins that fit inside the little diaper.
In response to the question asking how do you mate dogs...Please BE a RESPONSIBLE breeder! The dogs will do the work, just make sure the male and female are together the second week of her heat. I implore you all to remember that while puppies are precious and loads of fun, they will need homes! Do not breed just for the sake of breeding!
I currently have a 7 and a 1/2 month old female Puggle who has begun to hump my male Puggle. She has no bleeding, and no swelling of the vulva at this time. Females humping males CAN be a sign of an oncoming heat. It can also be a sign of dominance. She is certainly approaching the age for her first heat. My male is almost 4 months, and too young to breed. Sadie is also far to young to have puppies! She is still a puppy herself!
As several others wrote, you all have a wealth of information at your fingertips! I suggest you call your vet with questions, and read all you can on the WWW. Google is a great search engine, and it brought me to this page. Simply type in www.google.com and research all you can! Type in things like: Is my dog in heat? How do I know if my dog is in heat? What are the signs of a dog in heat? etc...I sure hope this helps!
I also hope and pray these dogs are all up to date on their shots! I am concerned that some of you have never asked your vet these questions, and I just pray you have a vet! In closing...be careful mating your dogs! Try and stay within the breed. Remember, a female in heat should be kept under lock and key, for those of you with backyard dogs!
Also bear in mind, breeding is a huge responsibility! If you have a tiny female and a large male, chances are good your female will need a cesarean section to deliver the puppies. Are you prepared to pay for this? Do you want to risk the life of your dog and her puppies just for the sake of breeding like it is some 'cool' thing to do?
A female in labor should produce a puppy within the first 4 hours of her labor. If she does not, call your vet IMMEDIATELY!
Please, educate yourselves to ALL the aspects of breeding dogs before you undertake the task, as it is a big job! And an expensive one!