A study released by the National Academies of Sciences, Engineering, and Medicine cited significant evidence for a statistical link between mothers who smoke marijuana during pregnancy and lower birth weights of their babies.  Cannabis consumption in pregnancy is associated with restrictions in growth of the fetus, miscarriage, and cognitive deficits in offspring.  Although the majority of research has concentrated on the adverse effects of alcohol, there is now evidence that prenatal exposure to cannabis has serious effects on the developing brain and is associated with "deficits in language, attention, areas of cognitive performance, and delinquent behavior in adolescence".  A report prepared for the Australian National Council on Drugs concluded cannabis and other cannabinoids are contraindicated in pregnancy as it may interact with the endocannabinoid system . 
Neoplasms: Liver (hepatic hemangiosarcoma, liver cell adenoma, hepatocellular carcinoma ); breast (fibrocystic disease, breast carcinoma); endometrium (endometrial carcinoma); nervous system ( astrocytoma , pituitary tumor, prolactinoma, neurofibromatosis , glioblastoma multiforme , brain abcess); ovary (luteoma of pregnancy, dermoid cyst of the ovary , ovarian carcinoma); trophoblastic (hydatiform mole, choriocarcinoma ); miscellaneous ( melanoma , myeloma , perianal cysts, renal cell carcinoma , Hodgkin's lymphoma, tongue carcinoma, bladder carcinoma)
The long and short of it is that there can be consequences when we don’t live a healthy lifestyle that includes activity. Research even shows that people who vigorously exercise either before or after excessive sitting cannot undo many of the negative health factors. 7 So where does that leave us? Some experts say you should start standing up at work for at least two hours a day, and work your way toward four. If excessive sitting is leaving you sore, you can also schedule an appointment for a free injury screen at your nearest Athletico location.