A 16-year-old girl presented with primary amenorrhoea. In early childhood she had undergone an inguinal herniorrhaphy. She had no other medical history of note. There was a family history of infertility affecting a maternal aunt.
On examination, she had adult breast development but no pubic or axillary hair.
Examination was otherwise normal.
What test is most likely to aid diagnosis?
A . blood karyotype
B . MR scan of pituitary and olfactory bulbs
C . ovarian antibody titres
D . plasma gonadotropins
E . ultrasound scan of pelvis
Answer: A