When Marcella reached puberty but did not begin to menstruate, her parents took her in for medical testing. Tests revealed that Marcella's chromosomes are XY and her gonads are producing testosterone, but she developed feminine external genitalia because her body is unable to respond to testosterone. Marcella is diagnosed with . . .

Question

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Marcella's condition is consistent with androgen insensitivity syndrome, where an individual has XY chromosomes and produces testosterone, but their body cannot respond to it, leading to the development of female external genitalia.

When Marcella Reached Puberty but Did Not Begin to Menstruate