Ultimately using Starbuck for breeding purposes would be a major twist in the storyline. Another twist would be if Starbuck decided she wanted to keep any baby she might have.
Since the Cylons have her ovaries, it is possible for her to have already been used that way. However, the conception of Hera seems to have made love a necessary ingredient to bring forth the "new generation of god's children". Kara's Cylon jailer on New Caprica worked hard to get her to love him, manipulating her with the child he had. The Cylon's original plan may have been disrupted by the failure of their clinical breeding program, with the birth of Hera showing them the way. If Hera died, would she awaken in a re-birthing tub?
Another twist would be if Starbuck decided she wanted to keep any baby she might have.
If the child's mother hadn't claimed her, you bet Kara would have done anything & everything to keep "her" child.