I answered this in the other thread, but here is a great spot for it as well since it is a great question.
MK2688 (aka Osta) is only slightly suppressive and should not give you any problems with having a baby, provided you are otherwise healthy. If you (generic you - aka anyone, not personal you) have sperm issues or have any issues that cause you to be the weak link in baby making, I would stay away from anything that can even touch the HPTA axis at all, which is just about any PED (GW50 and AICAR are 100% non-suppressive, though).
So in short, you can run Osta at the recommended dosing and not have to worry about babymaking.