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What Causes Delay In Growth Of Facial Hair?
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Testosterone
Detailed Answer:
When I see someone like you in my practice, in addition to a physical examination I also tend to order the following blood tests:
CBC
CMP (Electrolytes, Glucose, Calcium, Liver and Kidney function tests)
Total Testosterone
SHBG
TSH
If these are normal then I conclude that there is no 'Androgen' (male hormone) deficiency to explain the lack of adequate male pattern hair.
If anything is abnormal then further testing is warranted. This entails a comprehensive systematic evaluation that includes a variety of tests depending on the results of the first round of tests:
FSH
LH
Prolactin
Ferritin
Karyotype
However, there are many young adult males who have no hormonal problems and still have below-average male pattern body hair growth
I suggest you see an Endocrinologist in person because this requires a thorough in-person assessment.
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Follow up
Detailed Answer:
I understand what you are saying. Regarding your query here, the only medical condition that needs to be ruled out is testosterone deficiency.
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