The sperm of redheads might be getting knocked back elsewhere, but New Zealand sperm banks welcome ginger swimmers.
A lack of demand for redheaded sperm has prompted Denmark's Cryos sperm bank, which provides sperm to women in 65 countries, to start knocking back donors, London's Daily Telegraph reports.
But fertility expert Richard Fisher, from the country's largest fertility clinic Fertility Associates, says there's always been a shortage of sperm donors in New Zealand.
"We'd like to have enough donors for everyone and the issue of whether they've got red hair or not is a red herring," Dr Fisher told stuff.co.nz.
"There's an assumption people will choose on physical characteristics but that's not necessarily true. People are aware of it but it's not their primary choice."
A recent peak in donations at the Denmark bank meant they could be selective about their donors, Cryos's director Ole Schou said.
"There are too many redheads in relation to demand," he told told Danish newspaper Ekstra Bladet.
"I do not think you choose a redhead, unless the partner - for example, the sterile male - has red hair, or because the lone woman has a preference for redheads. And that's perhaps not so many, especially in the latter case."
But in New Zealand, Dr Fisher says people have "very little choice".
NZN