One of the pregnant girls, Lindsey Oliver, 17, told ABC's "Good Morning America" in June that the pregnancies were not intentional but "unlucky" and a "coincidence."
"There was definitely no pact," Oliver, who became pregnant when she was a junior, told ABC News. "There was a group of girls already pregnant that decided they were going to help each other to finish school and raise their kids together. I think it was just a coincidence."
Oliver said the school should reverse a policy that bans the school's distribution of contraception to students.
"[Officials] say they want to make a difference but won't do anything to help [students]," Oliver said. "They should be giving contraceptives out in the nurse's office."
Asked if distributing condoms and birth control would further encourage underage sex, Oliver said, "The kids are obviously having it anyway; there are 17 pregnant girls."
Mayor Kirk said that district policy did not permit the distribution of contraceptives, but that the policy was under review.
Sullivan said in his statement and to Time that the distribution of contraceptives would not have curbed the number of pregnancies because the girls were actively working to get pregnant.
According to Sullivan, as quoted in the Time article, one girl had sex with a 24-year-old homeless man, although the mayor has said that there's no evidence of anyone committing statutory rape.
Gloucester, a socially conservative fishing town about 30 miles north of Boston, has struggled with teen pregnancy for years, although on average only four girls a year typically become pregnant at the 1,200-student high school.
In May, two officials at the high school health center resigned to protest the local hospital's refusal to distribute contraceptives through the school without parental consent.