HARTFORD, Conn. (CBS 2/AP) — Results of a study examining the sexual behaviors of Connecticut high school students have alerted health officials to what may be a dangerous trend.

The survey, conducted by Connecticut health and education officials, shows that about two-thirds of high school seniors in the state have had sex in the past year but only 59 percent of them say condoms were used.

The results from the state’s 2009 Youth Risk Behavior Survey has health officials worried that not enough teens are taking precautions against sexually transmitted diseases and too many are relying on peers instead of parents or teachers to get information about safe sex and healthy relationships.

The survey also found that sex begins in freshman year for one in four students.

Nearly 41 percent of all high school students said they had sex within the past 12 months, which is below the national rate of 46 percent.

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