Certain high quality extracts of Aloe vera are safe to be taken orally during pregnancy and by nursing mothers if they contain only the mucopolysaccharide portion of the compounds in Aloe vera. In fact, it is one of the best supplements a pregnant woman or nursing mother could take. On the other hand, pure unrefined Aloe vera may not be safe for pregnant women or nursing mothers due to the fact that it contains so many other compounds, some with a laxative effect and others that cause allergic reactions in some individuals.