Reading your threads title "world reversed on my sisters pregnancy" , I immediately thought: a breeched baby.. and I don't know how far along she is, but if she's around 6-8 months pregnant, it's only normal for baby's to be in this position...the baby's goes into the right position by 34-36 weeks. and thinking about this some more, The World reversed indicates that the cycle has not been completed yet... which only indicates that the baby is just not due yet, still . Your sisters pregnancy is not completed yet...but how about she's nearly to the due -date? then it would be only appropiate for the world to come up reversed.
Also please don't worry about the horrors you autimatically seem to go with, seeing a reversal card.. because I really don't think thats the case here. The world is a beautiful card to get for a pregnancy, and the fact that its reversed, would only indicate it's not completed yet
And besides the question was about her pregnancy...not about the childbirth itself.
So hope you've calmed down a bit.. tell your sister also not to worry.. and next time I think it will be better to go see her gyneacologist FIRST before doing cards...so you know that everything is okay to start with
Maybe a tip for you aswell to do a multiple card spread, like a 3 cardspread... or just a clarifying card...just to gain additional information of the meaning of a particular (reversed) card.
Hope this helped you a bit!?!
-Blessings- Q