Am pregnant in 9months is it safe for me to use hydroqiunone cream for cholosma ?

Yes - but why now?: Although this cream has not been studied in humans (not even in animals) during pregnancy, systemic absorption should be minimal and I do not anticipate any effect on your fetus (good, bad, or other). On the other hand, why take it now? Wait until postpartum to treat pregnancy mask (chloasma), as it is likely to spontaneously resolve to a great extent and therapy may be more effective.