Male factor infertility affects 40-50% couples who struggle to have a baby.
Unlike women, men continue to produce sperm throughout their whole lives. Sperm cells are produced in the testes and are transported in semen into the vagina. From there the sperm must swim through the cervix, past the uterus and into the fallopian tubes to fertilise a waiting egg.
According to the World Health Organisation (WHO) a healthy semen sample contains over 15 million sperm in every ml. This means that one ejaculate can contain hundreds of millions of sperm - each one genetically unique. It is actually estimated that men produce approximately 3000 sperm every second! However, there can be many ways sperm production fails and this is why so many couples struggle with male factor infertility.