[HighlandYorkies]

Personnaly I would be worried as she is a tad on the small side. Yes, you can get a really tiny male at 2lbs or so to be the stud...but you would have to be soooo sure that he came from tiny lines with no larger throwbacks and health issues.
I am with you...you have to start somewhere....if you do it at all.

I speyed my 4lbs first female TARA at 1 year as I thought she was too delicate and small.
I tried with my 4 and 3/4lbs broader female TAMMY, and my 4 and 1/2 lb very slim male CASPER...and she reabsorbed... and was too old at 3 to try again for a first litter....so I speyed her and I was glad after that I did. I was going to keep the pups, but it was not to be.

Casper is going to be a daddy for the first time with a huge Yorkie(15lbs or bigger) belonging to a friend...and I am not worried for that birth at all...and it is looking like he has another smaller female pregnant too(another friend's)...but at 5 and 1/2 lbs I am hoping she will be ok if she is....it will be hard on her.
I have recently bought Corky who is now 5 months...and I am thinking of neutering him as Casper is too thin to risk neutering...and I don't want fights.

Yes I am disappointed I never had any pups of my own, but perhaps it would be better if, since you also have a delicate female to spey her and get her a "friend"...a male....I did that for Tara and she and Casper love eachother....that way you can look for a really good male and learn about using him for stud once in a while...that way you see the pups, can get a pup if you want one, and offer help and advice to the owners of the female.
Or....you could buy a larger female, but remember if you do, there will be issues with who is boss and one will have to be speyed...and the unspeyed one could still be aggressive with hormones.

Hope that helps.....if you spey your girl, you do feel better afterwards, believe me...been there, done it twice !
(...And you don't then need to be concerned about your puppies and giving them up to new homes.)

If you want to try and mate her....really look into a tiny male stud, and how healthy it is ....but it is scary when your baby could be at risk....on the other hand she could be ok...but there is always the chance you could lose her.

Love Debra x x x