Infertility
Infertility is a condition of the male or female reproductive system described by the inability to conceive after a period of 12 months or more of unprotected sexual activity.
low sperm count
A low sperm count, also known as oligozoospermia, occurs when a man's sperm count is less than 15 million per millilitre of sperm. Low sperm counts might make it more difficult to conceive naturally, although successful pregnancies are still possible.
male infertility
Male infertility occurs when a man is unable to conceive with his female companion. Male infertility has a variety of causes. It's possible that you don't produce enough or healthy sperm. You could have a hereditary disorder such as cystic fibrosis.
Non-obstructive azoospermia (NOA) in Male
The most severe form of male infertility is nonobstructive azoospermia (NOA), which is defined as no sperm in the ejaculate due to spermatogenesis failure. NOA is caused by either intrinsic testicular dysfunction or insufficient gonadotropin production.