US health officials on Friday said pregnant women planning to travel to Brazil for the Olympics should reconsider taking the trip because of the Zika virus. The Centres for Disease Control and Prevention (CDC) called the outbreak in Brazil "dynamic" and recommended that pregnant women consider not going to the games, which are scheduled to take place in August. The CDC said pregnant women who must go to the Olympics should talk to their doctor first and strictly follow steps to prevent mosquito bites during the trip, dpa reported. The CDC also said it had confirmed nine cases of Zika in pregnant women in the US who contracted the mosquito-borne Zika virus while traveling. The CDC said in addition to the nine cases it is investigating 10 other reports of Zika virus disease among pregnant women who traveled outside the US.