In 33 US states, cannabis (often known as marijuana) is currently acceptable for either medical or recreational use. Today, more states are thinking about legalizing marijuana for medicinal and/or recreational purposes. There will be an increase in the number of pregnant, nursing, or planning-to-get-pregnant women. The obstetric care provider must be knowledgeable about pharmacology and potential effects on pregnancy and lactation in order to give the gravida with the best possible guidance. This essay offers an insightful analysis of cannabis for those who provide obstetric care. The available research indicates that there is no safe level of marijuana and related product consumption during pregnancy or lactation. The use of cannabis and related products should be avoided during pregnancy and lactation since they have the potential to negatively affect maternal, fetal, and long-term child development.