Kybella injections prior to pregnancy - 4 vials total.

I recommend simply having neck liposuction, which does not require multiple treatments over time.  A single neck liposuction is much more effective than multiple Kybella treatments.  You get your result with a single treatment with a brief recovery period.  Because of the lack of information about how Kybella could effect your efforts to become pregnant, don't do Kybella while trying to conceive.

Hi nejsisjsnd,
The body produces endogenous deoxycholic acid and Kybella, a synthetic form is metabolized and excreted the same way. It does not get stored and is not likely to be in your bloodstream "in the next year or two".
While there are no human studies about Kybella's adverse effects on women who are pregnant or trying to get pregnant, there is a wealth of information on animal studies. Both male and female rats given the equivalent of five times the human dose did not suffer any ill effects. Fertility was not affected. In another study conducted on pregnant rats, there were no effects on the organ formation of fetal rats.
Talk to your doctor about your concern. There are other options like CoolSculpting, liposuction and surgery (depending on whether you intend to use it for submental fullness or the "bra fat" area).
All the best,
Justin Harper M.D.