The research suggests that there is no safe period to consume marijuana during pregnancy. Scientists have shown in a new study that one-time exposure during early pregnancy to cannabinoids (CBs) like THC or CBD can trigger growth abnormalities in the developing embryo. This was the first time that such a connection has been highlighted in the mammalian womb.
Parnell says that CBD and THC may be causing defects as a result of interactions at the cellular level that disrupt signaling between molecules and cells that control growth and development.