The US CDC, Centre for Disease Control, has said that currently 14 sexual transmission cases of Zika virus are under its investigation.
The cases are surrounding pregnant women.
The revelations were made by the body at a time it was publishing guidelines concerning transmission of the virus.
The guidelines are a response to the first case of Zika virus that was reported in a non-traveler in the US.
The case has been associated with sexual contact with a Zika virus-infected partner.
The advice of CDC is that if they visit an area that has the virus, they should use a condom or abstain from sex during the pregnancy period.
The health body added that there is no evidence supporting that women can transmit the virus but more research is required in the same.
Scientists have a strong belief to the theory that Zika virus can be linked to microcephaly after a study was done on a Brazilian pregnant woman.
The effect of the virus is that babies are born having deformation especially on the heads and also their cognitive development is affected.
The research confirmed that Zika virus was present in the amniotic fluid of two pregnant women.
It is suggested by the Brazilian health experts that the infants can also be affected.
Mosquito bites remain to be the primary method in which the virus is infected into an individual. It is thus important for the pregnant women to try and avoid the insects.
Margaret Chan, the World Health Organization head, said that the world still has a long journey in its ambition to fight the Zika.
Most cases have been recorded in Brazil. Speaking from the country, she said the virus is “very tenacious, very tricky and very difficult.”