See answer : Letrozole: fda-approved drug for the treatment of breast cancer. Blocks the conversion of androgens (testosterone) to estrogen. Commonly used in the body-building world. Regarding male infertility, there are a couple of small studies that suggest it may be helpful in non-obstructive azoospermia patients with normal serum fsh. Much more info needed b4 recommending this drug for male infertility rx.
Answered 8/2/2015
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