![[Zika virus and a fetus]](http://cdn1.medicalnewstoday.com/content/images/articles/312/312229/zika-virus-and-a-fetus.jpg)
Infection with Zika virus during pregnancy may be linked to a birth defect called arthrogryposis, characterized by joint deformities, say researchers.
Zika is a virus most commonly spread through the bites of infected Aedes mosquitoes.
The virus does not always present symptoms, but when it does, symptoms may include fever, rash, joint pain, conjunctivitis, headache, and muscle pain.