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Review Question - QID 214900

QID 214900 (Type "214900" in App Search)
A 17-year-old girl presents to her pediatrician because she has not yet had her first menstrual period. She is concerned because all of her friends and classmates have already gone through menarche. She has no significant past medical history and is up-to-date with all of her vaccinations. Physical exam reveals a thin girl with no sexual hair development and inguinal masses bilaterally. Speculum exam reveals a vagina that ends in a blind pouch with no evidence of a cervix or uterus. Which of the following reasons is most likely responsible for this patient's lack of internal female reproductive organs?