Scores of advocacy groups, including the American Civil Liberties Union and Planned Parenthood, assailed new Justice Department guidelines for treating rape victims yesterday because the detailed procedures make no mention of emergency contraception as an option that could spare some women an unwanted pregnancy.

The result is “a glaring omission in an otherwise thorough document,” the groups said in a letter sent to Diane Stuart, director of the Justice Department’s Office on Violence Against Women.

The president of the Planned Parenthood Federation of America, Gloria Feldt, called the omission “a blatant example of politics taking precedence over the emotional and physical health needs of women.” Her organization, and other groups, contend that information about emergency contraception was included in an early draft of the guidelines, then removed from the final version because of political concerns.

A Justice Department spokesman, Eric Holland, said Ms. Stuart’s office had received the protest letter and would “review its contents carefully.” The department offered no immediate comment on the specifics of the complaints.

Many major medical groups support the use of emergency contraception, and the American College of Obstetricians and Gynecologists recommends that it be offered to all sexual assault victims who are at risk of pregnancy. But many conservative groups contend that use of emergency contraception can be a form of abortion in cases where fertilization has already occurred.

More than 93,000 rapes were reported in America last year, according to the FBI, and many more went unreported. Estimates as to how many women became pregnant because of rapes range from 4,000 to 25,000, but advocacy groups say nearly 90% of such pregnancies could be prevented if victims had prompt access to emergency contraception.

Commonly known as morning-after pills, emergency contraceptives are a stronger dose of regular birth control pills. They are considered highly effective up to 72 hours after unprotected sex.

The ACLU, in a recent study of 11 states, found that many emergency care facilities do not routinely provide emergency contraception to rape victims. Results varied from lows of 6% of facilities in Louisiana and 8% in Idaho to highs of 80% in New Hampshire and 85% in New York.

Some states require hospitals to assist victims in obtaining emergency contraception; other states allow medical personal to withhold such services for reasons of conscience. The Justice Department said the new, first-of-their-kind guidelines were not intended to supersede state policies.

The step-by-step guidelines were released last fall after input from criminal justice and health experts, with the aim of ensuring that victims receive high quality medical and forensic services.

The 130-page document includes extensive suggestions for coping with the possibility of sexually transmitted disease, but only one sentence on pregnancy prevention: “Discuss treatment options with patients, including reproductive health services.”

The protest letter calls for the guidelines to be revised to specify that victims should be offered emergency contraception as routine policy.