For parents of teenagers already having sex, there is a section on contraception.

But Rodriguez said that section promotes unsafe sex rather than safe sex.

The site describes condoms as imperfect, saying they can break or be used incorrectly, and it includes a chart of whether a condom protects a little, some or a lot, against various sexually transmitted diseases.

"There's this misconception that giving young people negative information about contraception will encourage them not to have sexual intercourse, when all it will do is encourage them not to have contraception, so the strategy backfires," Rodriguez said.

Patrick Fagan, a research fellow at the Heritage Foundation, a conservative think tank, said the Web site's information about condoms looked accurate.

"This is standard, straightforward research on the effectiveness of condoms," he said.

The groups protesting the Web site also contend it is biased against gays and lesbians.

The site says: "If you believe your adolescent may be gay, or is experiencing difficulties with gender identity or sexual orientation issues, consider seeing a family therapist who shares your values to clarify and work through these issues."

Rodriguez said the Web site's definition for homosexuality — "a person who prefers sexual contact with people of the same sex" — implied that being gay was a sexual preference rather than a sexual orientation.

"There's no information whatsoever for their parents other than to go talk to a therapist," she said.

Fagan, though, said the Web site would be useful for parents of gays and lesbians.

"Teenagers involved in homosexual acts . . . are worth the same transmission of information on the effectiveness of condoms and on the dangers of sexually transmitted diseases," he said.