Gynaecology & Obstetrics An infant is found to have clitoral enlargement and some degree of labial fusion. What is the first step in arriving at a diagnosis? A Perform a karyotype B Perform an ultrasound scan C Perform blood 17-hydroxy progesterone levels D Perform serum testosterone levels 💡 Explanation An infant is found to have clitoral enlargement and some degree of labial fusion. What is the first step in arriving at a diagnosis? ✓ Correct Answer: A. Perform a karyotype