The government of Mexico has confirmed on Monday that 11 women who are pregnant are infected with the Zika virus, out of a total of 121 cases.
Most of the cases were identified in the Southern Mexican states of Chiapas and Oaxaca, according to the health ministry report.
Eight of the pregnant women are Chiapas, two are from Oaxaca, and one is from the Gulf coast state Veracruz, the health ministry reported.
The number of cases of infected pregnant women has risen since mid-February, when the health ministry said there were 80 confirmed cases of Zika, including six cases of pregnant women with the virus.
A lot still remains to be known about the virus, including the fact that whether the virus actually causes microcephaly, a condition marked by small heads that can result in development problems.
Brazil has also confirmed more than 580 cases of microcephaly and considers most of them to be related to Zika infections in the mothers. Brazil is investigating more than 4,100 additional suspected cases of microcephaly.
(With Inputs from Reuters)