She is WAY to young!!
Wait at least until she is 2 years old, now she's just a puppy!
Its like if a 13 year old kid would get pregnant, that isnt good.
Read about breeding before you breed.
And not every dog is suppose to be breed, if a dog is healthy, good natured, has gone in a dog show and done great there, THEN you should at first think of breeding.
And the dog has to be at least 2 years, not younger.
__________________ Sun [Owner]  , Fido [Yorkie]  , Mímir [Chinese Crested]  , Kría [Icelandic cat]  , Skuggi [Forrest cat] |