Cannabis use during pregnancy poses a serious risk to an unborn baby. Substances found in cannabis can travel through the motheru2019s blood to her unborn baby during pregnancy and reduce the supply of oxygen and nutrients to the fetus, which can in turn affect brain development and lead to health problems. Some studies have linked cannabis use to lower birth weight, slower growth and lower alertness in newborns. It can also decrease the babyu2019s ability to self-soothe and lead to increased sleep disturbances. Using cannabis while pregnant also increases the risk of the child having problems with learning, memory, perception, verbal reasoning, and problem solving later in life. It can also increase a childu2019s risk for experiencing hyperactivity, impulsivity and attention deficits. Substances found in cannabis, such as THC, can also pass into breast milk and become absorbed and metabolized by a baby during breastfeeding. Cannabis use can also cause problems for couples planning a family. Men who smoke cannabis are at a higher risk of decreased sperm count, abnormal sperm, and poor motility (spermsu2019 ability to swim).