Eight pregnant women have been infected by the Zika virus among the 329 cases in Singapore, the government said on Sunday.
Malaysia is bracing for more Zika cases, officials said on Sunday, after detecting the first locally infected patient, which could further stretch a health system struggling with dengue, another mosquito-borne virus that can be fatal.
Malaysia reported its first locally transmitted Zika case on Saturday, a 61-year-old man who has died of heart-related complications, the government said.
Australia, Taiwan and South Korea advised pregnant women and those attempting to get pregnant to avoid travel to Singapore after an outbreak of the Zika virus infected more than 50 people in the city-state.
Singapore on Sunday confirmed 41 locally transmitted cases of the Zika virus, which can cause deformities in unborn babies, and said more infections are likely.
US President Barack Obama called on Congress Saturday to step up funding to combat the Zika virus, warning that delay is putting more Americans at risk.
Thirty-three members of the US military, including a pregnant woman, are believed to have contracted the mosquito-borne Zika virus overseas, the Pentagon said on Wednesday.
Every week, scientists in southern China release 3 million bacteria-infected mosquitoes on a 3 km (two-mile) long island in a bid to wipe out diseases such as dengue, yellow fever and Zika.
Tens of thousands of babies may be born with debilitating Zika-related disorders in the course of the outbreak sweeping through Latin America and the Caribbean, researchers said Monday.