1. Defective sperm production:
Improper hypothalamus and pituitary signals(Hypogonadotropic Hypogonadism), hypothyroid, medications, steroids taken for body building, damaged testis (trauma, infection, genetic conditions, Cryptorchidism, Cancer)
2. Defective sperm transport
Cystic fibrosis, blocked tubes (due to vasectomy, infection or congenital defect)
3. Defective sperm deposition
Retrograde Ejaculation, Erectile dysfunction / impotence, premature ejaculation
4. Damage to sperms
Varicocele, Obesity, Occupational hazards, Lifestyle
PCOS is diagnosed if 2 of the following 3 criteria are met.
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