More sperm donors are needed in the south of England to allow experts to continue to provide infertility treatment to couples who are unable to conceive.
Southampton University Hospitals NHS Trust operates one of only a handful of sperm banks in the south of England but is suffering from a recent fall in sperm donors.
Fertility experts at the trust have revealed that they "desperately" need more donors and are appealing for men to come forward.
Fertility consultant Nick Brook, who is based at Southampton's Princess Anne Hospital, commented: "The donation of sperm to help a couple have a child is one of the most generous gifts anyone can give.
"We are keen to hear from any men aged between 18 and 45 who may be willing to provide this vital service to help infertile couples."
Donor sperm can be used if a male partner has no or very few sperm, has had a vasectomy, has an infectious disease such as HIV, or has a genetic disorder that may be passed onto a baby.
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