Covid lockdowns set adolescents back in their schoolwork and led to the worst exam results in math and reading on record.

Researchers now caution that pandemic disruptions may have adversely affected sex education, leaving middle and high school students less confident in safe practices and more susceptible to dangerous diseases.

A study by Brown University indicated that seventh graders, typically 12 to 13 years old, who received sexual education in the 2023 to 2024 school year (post-pandemic closures) expressed more negative feelings and beliefs on the subject compared to those who were taught in 2018 to 2019 (pre-pandemic).

Results showed, however, that both groups did show interest in the topic.

Parker Haddock, the medical student behind the research, remarked: ‘While middle schoolers are learning factual information about sexual health, there is more to it than just that.

‘To encourage students to make healthy decisions, sexual health education must be conveyed in ways that foster knowledge, belief, and confidence, leading to practical real-world application.’

Adolescents face a higher risk of encountering sexually transmitted diseases (STDs), unintended pregnancies, or unhealthy relationships compared to older individuals because of their higher propensity for risk-taking behaviors.

And there has been a recent shift in adolescent sexual behavior, with surveys suggesting condom use has been on the decline.

Scientists are raising concerns about the impact of Covid lockdowns on sexual education (stock image)

According to a 2023 World Health Organization study covering 41 countries, the percentage of sexually active 15-year-old boys reporting condom use during their last intercourse decreased from 70 percent in 2014 to 61 percent in 2022.

For girls of the same age, 57 percent reported using a condom at last intercourse compared to 63 percent in 2022.

And while across the US, the number of STD infections has fallen annually, CDC data showed that for adolescent males aged 15 to 19 in 2023, the latest date available, the number diagnosed with chlamydia, the most common STD in the US, rose 3.2 percent.

For the recent study, the students completed an eight-lesson sexual education program and then filled in a survey on their experience.

Two different classes completed the survey. One during the in 2018 to 2019 school year, and a second for the 2023-2024 year.

The researchers said the results were yet more evidence that children needed to be taught in classrooms for their emotional and social learning skills.

During Covid lockdowns, when sexual education shifted to virtual-only, educators saw a few pluses, such as virtual anonymity increasing engagement.

But they also warned it led to a lack of access to vital resources, while virtual classes made it unclear how many of the students were engaging with the lessons.

The research was revealed as an abstract ahead of its presentation at the American Academy of Pediatrics 2025 National Conference and Exhibition at the Colorado Convention Center on Sunday. It was not clear whether it had been peer-reviewed.

No further details were provided, including in which state the sexual education classes were undertaken, what course the children completed or what questions they were given to answer.

Daily Mail contacted the researchers ahead of the publication of this story for more details, but did not receive a reply. 

Additionally, the study was part-funded by the Family Medicine Health Resources and Services Administration (HRSA) and The Warren Alpert Medical School Student Senate Funding Board.

Haddock added: ‘Sexual health curriculum needs to evolve so it can meet students where they are at and give them the tools they will need.’

Sexual education is seen as an essential part of the curriculum in many areas, teaching children about the risks from STDs, HIV, safe sex practices, puberty, anatomy and healthy relationships. 

Experts say it can boost contraceptive use, delay sexual activity, slash risky sexual behaviors and reduce the risk of unintended pregnancies.

But critics argue that the topic should be the responsibility of parents, not schools, while others fear it may promote sexual activity, rather than discourage it.

Sexual education is split by states in America, with only 32 requiring sexual education, while 34 mandate school instruction about HIV.

About 31 states also mandate instruction on child abuse prevention. 

Sexual education is broadly popular among parents, however, with a 2025 nationwide Planned Parenthood survey finding that 84 percent of parents supported the education in middle school and 96 percent support it for children in high school. 

Surveys suggest that young adults aged 18 to 30 years old are now having less sex than ever, with a 2023 survey finding that one in four people in Generation Z had not had sexual intercourse.

Members of the generation report they are avoiding sex over fears of sexually transmitted infections, of being judged or criticized and anxiety about the potential consequences.