Couples trying for a baby should delay by a month if the man has recently returned from a country affected by the Zika virus.
The warning, from Public Health England, goes as far to say that men should wear.......
condoms for 28 days if their partner is or may be pregnant.
Men who suffered an unexplained fever while travelling, or who were diagnosed with the virus, should avoid unprotected sex - or trying for children - for six months, the guidance states.
The virus has been linked to birth defects in thousands of Brazilian babies, born with heads smaller than normal and undeveloped brains.
Symptoms include a rash, fever, conjunctivitis and headache and, to date, 23 countries have been affected.
Pregnant women or those trying for a child have already been officially warned to avoid travelling to South America.
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