Generally speaking, teenager girls' vaginal lining is too thick to experience vaginal orgasm due to estrogen surge for building the female 2nd sexual charateristics.. When the estrogen surge is over after 18 or 20, young women will start to experience weak vaginal orgasm. The peak orgasm age is after age 30, as long as the testosterone level remains high, about 40 ng/dl (serum) or higher
However, birth control pill may mask her ovarian function to lower or suppress the testosterone production and overdose the female body with excess estrogen, leading to the female orgasm dysfunction.
The pill can completely kill her orgasmic ability and response.
However, teenager girls can experience clitoral orgasm which seems nothing to do with estrogen surge.