Caffeine has always been related to various health complications for an adult. However turns out it affects the unborn child of caffeine consumers as well. According to an observational study exposure to moderate to high caffeine levels while in the womb is linked to excess weight gain in early childhood. The findings which back general advice to limit caffeine intake while pregnant prompted the researchers to query whether mums-to-be should cut out the world's most widely consumed central nervous system stimulant altogether. Caffeine passes rapidly through tissues including the placenta and takes the body longer to get rid of during pregnancy.