Has anybody ever tried to add extra nipples to a human? The milk lines run from crotch to shoulders, and with the right injections of hormones or stem cells, should be able to trigger the development of more nipples (or udders?)

Inspired by a dream, I'd like to see if extra nipples are something I could get with off-label injections from my doctor.

I think it's possible, but

Well I'm sure that some day, probably in our lifetime, they would be able to grow your own nipples using stem cells and then transplant them to wherever you want. Heck why not have a nipple or two on your cock?

But no, there is curently no injections that can grow nipples, especially in locations where nipples don't normally form.

I know a lot about the developmental biology of breast formation, but not nearly enough. The stem cells are already there - and sometimes they activate early, see people with a third nipple. Alas, the milk line is often lost, but for those who retain the strip of stem cells, it seems like there should be a pharmaceutical way to induce the growth of extra nipples or even mammaries from the residual stem cells.