Yes. Male factors contribute to about 40–50% of infertility cases.
A semen analysis is the first step, sometimes followed by hormone blood tests or DNA testing.
Depending on the cause: medication, surgery (e.g., varicocele repair), or assisted reproduction like ICSI, which only needs a single healthy sperm.
Yes. Sperm DNA quality decreases with age, which can increase infertility or miscarriage risk.