Assessing Marijuana Use During Pregnancy

Perceptions about cannabis use during pregnancy: a rapid best-framework qualitative synthesis

OBJECTIVE

A rapid review was conducted in order to produce a streamlined and time-limited systematic evidence review to understand women's perceptions, beliefs, and knowledge of the risks associated with cannabis use during pregnancy.

METHODS

MEDLINE(R) and Epub Ahead of Print, In-Process & Other Non-Indexed Citations and Daily, EMBASE, PsycINFO (OVID interface), and CINAHL (Ebsco interface) databases were searched from inception to March 2019. Qualitative and descriptive studies, and reviews that addressed pregnant women's perceptions, beliefs, and attitudes about personal cannabis use were included. The methodological quality of the included studies was appraised using valid tools and data extraction was guided by suitable checklists. Full text of 18 citations was retrieved and reviewed, and 5 studies met the inclusion criteria.

SYNTHESIS

Women who continued to use cannabis during pregnancy often perceived less risk compared with nonusers. Their uncertainty regarding adverse consequences, perceived therapeutic effects, and lack of communication with health care providers contributed to cannabis use. Women perceived this lack of counselling as an indication that outcomes of cannabis use while pregnant were not significant.

CONCLUSION

This synthesis highlights important factors in women's decision-making processes regarding use or cessation of cannabis during pregnancy. In addition, the importance of health care providers providing information, education, and appropriate counselling to childbearing women is highlighted as these conversations may influence women's perceptions of risk and help them make informed choices.

hiPSC-Based Model of Prenatal Exposure to Cannabinoids: Effect on Neuronal Differentiation

Phytocannabinoids are psychotropic substances ofcannabis with the ability to bind endocannabinoid (eCB) receptors that regulate synaptic activity in the central nervous system (CNS). Synthetic cannabinoids (SCs) are synthetic analogs of Δ⁹-tetrahydrocannabinol (Δ⁹-THC), the psychotropic compound of cannabis, acting as agonists of eCB receptor CB₁. SC is an easily available and popular alternative to cannabis, and their molecular structure is always changing, increasing the hazard for the general population. The popularity of cannabis and its derivatives may lead, and often does, to a child's exposure to cannabis both in utero and through breastfeeding by a drug-consuming mother. Prenatal exposure to cannabis has been associated with an altered rate of mental development and significant changes in nervous system functioning. However, the understanding of mechanisms of its action on developing the human CNS is still lacking. We investigated the effect of continuous exposure to cannabinoids on developing human neurons, mimicking the prenatal exposure by drug-consuming mother. Two human induced pluripotent stem cells (hiPSC) lines were induced to differentiate into neuronal cells and exposed for 37 days to cannabidiol (CBD), Δ⁹-THC, and two SCs, THJ-018 and EG-018. Both Δ⁹-THC and SC, at 10 μM, promote precocious neuronal and glial differentiation, while CBD at the same concentration is neurotoxic. Neurons exposed to Δ⁹-THC and SC show abnormal functioning of voltage-gated calcium channels when stimulated by extracellular potassium. In sum, all studied substances have a profound impact on the developing neurons, highlighting the importance of thorough research on the impact of prenatal exposure to natural and SC.

Pharmacologic Implications of Marijuana Use During Pregnancy

Marijuana is the most commonly used recreational drug in the United States, including among women of childbearing age and women who are pregnant. Changing legal statutes that allow for the use of medical marijuana and the decriminalization of marijuana for personal use reflect more permissive societal views on the use of this drug. Active compounds in marijuana cross the placenta rapidly and are excreted in breast milk. Results of studies of the effects of marijuana on a developing fetus and neonate are conflicting, but researchers have identified chronic marijuana exposure as a risk factor for preterm birth and small-for-gestational-age infants. This article reviews the pharmacology of marijuana and discusses implications for nurses who work with women of childbearing age.