Mouse Study: E-Cigarette Aerosol May Affect Fetuses

According to Vapingpost on June 5, because the use of e-cigarettes during pregnancy remains controversial and continues to spark debate from both supporters and opponents, a recent study aimed to address this issue by analyzing the effects of e-cigarette aerosol exposure on adult male rat offspring.

 

The study, titled “Effects of E-cigarette Smoke Exposure During Pregnancy and Lactation on Learning and Memory in Adult Male Rat Offspring,” will be published in Physiology & Behavior. Researchers exposed rats to either fresh air or e-cigarette vapor for one hour per day from days 4 to 21 of pregnancy and lactation.

 

The male offspring were followed for 19 weeks (human male fetuses are considered more vulnerable to stress than female fetuses), after which their spatial learning and memory abilities were tested.

 

The results showed that, compared with fresh air, aerosol exposure during pregnancy and lactation impaired the long-term memory of adult offspring (P <0.05). Based on this, the researchers concluded that smoking during pregnancy should not be encouraged.

 

At the same time, in response to studies like this on e-cigarette use during pregnancy, e-cigarette advocates have consistently argued that such research should be considered carefully. Some have pointed out that while no one recommends that pregnant women smoke recreationally, ideally they should quit smoking altogether, whether these products contain nicotine or not. However, because e-cigarettes are considered much safer than smoking, heavy smokers who are unable to quit may still benefit—along with their offspring—from switching to a safer alternative.

 

French researchers recently conducted a systematic review analyzing international literature published between January 2003 and April 2019 on the topic of smoking cessation during pregnancy.

 

The review, titled “[CNGOF-SFT Expert Report and Guidelines on Smoking Management During Pregnancy – Short Text],” aimed to identify the most up-to-date evidence-based guidelines for smoking cessation management during pregnancy. The researchers searched the Cochrane, PubMed, and Embase databases using relevant keywords.

 

The compiled data showed that counseling has some positive effect on smoking cessation, and self-help interventions and health education are recommended when helping pregnant smokers quit. Once again, prescribing nicotine replacement therapies (NRTs) was recommended for pregnant women who were unable to quit by other means, but due to the lack of scientific evidence on the long-term effects of e-cigarettes, their use is generally not recommended.