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5 STIs That Affect Male Fertility

A man with a child walking on the beach

It’s well known that some STIs can affect fertility, or have complications during pregnancy for women, but can STIs affect male fertility?

In this blog we explore how STIs can affect male fertility, including some of the most common STIs in the UK. 

Can STIs Affect Male Fertility?

Some STIs can cause reduced fertility in men, if they go untreated. Similarly, untreated (or unknown) STIs can be passed onto sexual partners where they may also experience fertility issues. 

Because of this, it is vitally important to have regular sexual health checks, especially as some of the STIs that can affect male fertility are often asymptomatic.

How STIs Affect Male Fertility

In developed countries, STIs have only a mild impact on male fertility due to sexual health clinics and treatment being widely available.

However, where male fertility is impacted, it can affect both sperm transport and sperm count. 

Some STIs can cause infection and subsequent damage to the testicular tubes in which sperm travel, whilst other STIs can have an impact on sperm production.

These include chlamydia, trichomoniasis, and ureaplasma.

Another factor that could impact sperm function is inflammation associated with untreated STIs or genital tract infections. 

More research into this area is required, but recent studies have suggested that some STIs have the potential to impair sperm motility and viability.