1·About 35 percent of the women arrived in the first trimester, when microcephaly is most likely to develop, he said.
其中大约有35%的孕妇是在妊娠头三个月住进医院，那是最有可能出现小头畸形症的阶段，他说。
2·Zika virus infection during pregnancy has been linked to the abnormal brain development called microcephaly. Now a study finds more evidence for the connection.
在怀孕期间，寨卡病毒感染一直与脑发育异常称为小头畸形的疾病有关。现在的研究发现更多的证据来证实这一点。
3·The large outbreak in Brazil, which began in May 2015, is particularly worrisome because the number of cases of congenital microcephaly in newborns and stillborns has abruptly increased.
2015年5月起在巴西爆发的兹卡疫情尤其令人担忧，因为这里的先天性小头症新生儿和死胎病例急剧增加。
4·The U. S. Centers for Disease Control (CDC) explains on its website that there many causes of microcephaly.
美国疾病控制预防中心在其网站上解释说，小头畸形症有多方面的原因。
5·And the peak of Zika virus outbreak in pregnant women was followed approximately six months later with a peak of microcephaly reported in the country.
孕妇寨卡病毒爆发高峰期后约六个月，有一篇新闻报道了小头畸形。