
To review:
The reason behind low levels of LH (luteinizing hormone) and sperm count in an athlete who has been taking synthetic testosterone as a supplement.
Introduction:
The inability to get pregnanteven after a year of unprotected mating is termed as infertility. Infertility can arise in both males and females. In males, infertility is generally caused due to alow sperm count and in females, infertility may be caused due to ahormonal imbalance or aweak uterus. Male infertility constitutes about 40 percent of all the infertility cases and arises due to adecreased number of sperms. The low sperm count arises due to the low levels of LH.

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Human Anatomy & Physiology, Modified Mastering A&P with eText and Value Pack Access Card and Practicing A&P Workbook for Human Anatomy & Physiology
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