The administration of Mayor Bill de Blasio, under pressure from ultra-Orthodox rabbis, is set to ease New York City’s regulations on a controversial circumcision ritual that has been linked to herpes infections in infants.

The city is seeking to waive a rule that requires parents to sign a consent form before the ritual, which involves the circumciser using his mouth to suck blood away from the incision on a boy’s penis. The ritual is common among some branches of Orthodox and ultra-Orthodox Judaism.

Administration officials on Tuesday announced a new policy that they described as a compromise between reducing health risks for infants and protecting the religious freedoms of those who cherish the ritual, known as metzitzah b’peh, or oral suction.

The policy, which must be approved by the city’s Board of Health, involves a series of medical tests when a baby is found to have herpes. A circumciser who is proved through a DNA match to have the same herpes strain as the baby’s would be banned for life from the practice.