A conservative health-advocacy group will make a push today for the city to adopt an “abstinence only’’ sex-education curriculum in public schools after charging the Department of Education’s current program promotes sexual activity among youths.

Leaders of the Chiaroscuro Foundation criticized the DOE’s contract with the California-based publisher ETR Associates, which provides materials for the city’s “Health Smart’’ and “Reducing the Risk’’ curriculum aimed at teenage students.

Among ETR’s offerings is a series of “health fact’’ books that promote a number of organizations as worthy resources for teens on the Web including GoAsk-Alice.com.

Those who access the site can view postings on queries concerning such topics as bestiality and “S&M role-playing,’’ critics charge.

“This is terrible. This is clearly explicit and inappropriate information for a seventh-grader,’’ said Chiaroscuro’s Greg Pfundstein.

But spokesmen for ETR and DOE insisted that the “health facts’’ books in question — which include such topics as “reproductive health’’ — are not part of the city’s sex-education programs.

That curriculum has been recommended since 2007. But Education officials made sex-ed classes mandatory this year to help try to reduce unplanned pregnancies, prevent sexually transmitted diseases and bring down dropout rates.

City officials have defended the program as a responsible and realistic approach, urging abstinence for youths but also such “safe sex’’ measures as condom use for teens who are sexually active.