Pregnancy or breastfeeding is no time to be losing weight! Seeking to achieve significant weight loss during these periods can threaten the growth of your baby, so intragastric balloons (and other weight loss therapies) should be avoided until after pregnancy and breast feeding has concluded.
Sometimes, women who suffer with PCOS (Polycystic Ovary Syndrome) may become more fertile as weight is lost, so contraception should be used while a balloon is in place. If you fall pregnant with a balloon in place, the balloon is removed when it is safe to do so, typically in the second trimester.
Otherwise, there have been no known problems to mother or baby from the presence of a gastric balloon.