My baby is only 23 weeks. Will he survive if born?

Perhaps. But may have serious health issues throughout his life.
Unlikely. Salvage rate at 23 wks is less than 5% with many of those suffering from cerebral palsy, related strokes, blindness, etc. Work hard to stay pregnant and target no less than 30+ weeks if they put you on bed rest.The uterus is the best environment for a fetus.There have been tremendous gains in the treatment of premi infants but there is a limit.