Microscopic examination of a cell's chromosomes can reveal the sex of the fetus.
用显微镜检查细胞染色体可以查出胎儿的性别。
At the end of the first trimester, the fetus is about three inches long.
在怀孕的第三个月末，胎儿差不多有三英寸长了。
There have been no studies of the effects of a low carbohydrate diet on pregnancy, so its effect on the fetus, if any, is unknown.
目前还没有关于怀孕时低碳水化合物饮食影响的研究，因此如果它对胎儿有什么影响也是不知道的。
Also, PAHs may affect the fetus' DNA directly.
多环芳烃同样对胎儿的DNA产生直接影响。
If the Y chromosome is detected, the fetus is male.
如果检测到Y染色体，则胎儿是个男性。
The risk of maternal influenza to the fetus is the same throughout pregnancy.
在整个妊娠期，母亲流感对胎儿的危险是同样严重的。
It is also dangerous to pregnant women because it easily passes through to the fetus.
由于它能轻易传递给胎儿，所以对孕妇而言也很危险。
Mother-to-child infection: the trypanosome can cross the placenta and infect the fetus.
母婴感染：锥虫可穿过胎盘并感染胎儿。
Expectant mothers may not know that what they eat affects the tooth development of the fetus.
准妈妈也许不知道她们所吃的食物会影响到胎儿的牙齿发育。
Many imaging tests are not performed during pregnancy so as not to expose the fetus to radiation.
许多成像测试在怀孕期间不能执行，以免使胎儿暴露在辐射中。
They said the mother and members of her family had not had the health problems found in the fetus.
研究人员表示，这位母亲和她的家人都没患过这名胎儿身上发现的健康问题。
Many experts are worried that BPA causes an abnormal development of the fetus and complications in delivery.
许多专家都很担忧BPA会造成胎儿的畸形发育以及生产过程中的并发症。
This finding demonstrates that the fetus is sensitive to BPA in mice and likely also in humans, Taylor said.
这一结果证明了老鼠胚胎对BPA的敏感性，人类也可能如此，Taylor说。
The ultrasound monitor is put in the patient’s line of sight, and she must also listen to a description of the fetus.
超声胎儿监护仪宜在孕妇的视线内,并且她也必须要听取有关胎儿的描述。
Could a pregnant woman be charged with child abuse if she smokes, or be denied chemotherapy if it might hurt the fetus?
如果一个孕妇吸烟，她会被控虐童吗？或者处于对胎儿的考虑，她可能无法得到化疗？
Women's exposure to pesticides, solvents and persistent organic pollutants may potentially affect the health of the fetus.
妇女对杀虫剂、溶剂和持久性有机污染物的暴露可潜在影响胎儿的健康。
There have been no studies of the effects of a low carbohydrate diet on pregnancy, so its effect on the fetus, if any, are unknown.
目前为止还没有关于怀孕时低碳水化合物饮食影响的研究，因此如果对胎儿有什么影响也是不知道的。
And research suggests that the effects of maternal depression on the fetus can lead to complications both during and after pregnancy.
而且研究表明，产妇抑郁对胎儿产生的影响可能会导致妊娠期内或之后的并发症。
According to the FDA's letter-grade system for drug safety during pregnancy, most psychotropic drugs pose a potential risk to the fetus.
根据美国食品药品管理局（FDA）的妊娠期用药安全评级系统（共五级，link），绝大多数精神病类药物对胎儿存在潜在危险。
The mouse babies were oversized because fat consumed by the mother causes the placenta to provide too many nutrients to the fetus, the study said.
研究表明，超大型鼠仔是由于母亲消耗的脂肪促使胎盘提供了过多的营养给胎儿而导致的。
Parents who have a family history of a severe genetic disorder use this test to determine the chances of the fetus developing a severe genetic disease.
一般有严重家族基因病史父母们用这项测试来检测胎儿患病的几率。
Two arteries and one vein connect the fetus to the placenta, re-circulating oxygen-rich blood and nutrients and keeping your blood separate from your baby’s.
两个动脉和一个静脉把胎儿与胎盘联结在一起，传递富含氧气和营养的血液，并把你的血液与婴儿自己的血液分离开。
Two arteries and one vein connect the fetus to the placenta re-circulating oxygen-rich blood and nutrients and keeping your blood separate from your baby's.
两个动脉和一个静脉把胎儿与胎盘联结在一起，传递富含氧气和营养的血液，并把你的血液与婴儿自己的血液分离开。
Taken together, these results suggest that glucocorticoid-receptor-gene methylation happens in the fetus in response to a mother's stress, and persists into adolescence.
总体看来，这些结论表明胎儿糖皮质激素受体基因的甲基化是由于母亲压力过大引起的，并且其影响将会持续到青春期。
Iodine deficiency during pregnancy not only results in brain damage to the fetus, but also in low birth weight, prematurity and increased perinatal and infant mortality.
妊娠期缺碘不仅导致胎儿脑损伤，而且导致低出生体重、早产以及围产期和婴儿死亡率增加。
Technically, back labor occurs when the fetus is in a posterior position, with its face up and the back of its head pressing against your sacrum, or the back of your pelvis.
从技术上来说，背阵痛发生在胎儿处于背对的位置，它的脸朝上而后脑勺紧靠你的骶骨或者骨盆后方。
HIV-positive women who wish to become pregnant should seek counseling about the risk to unborn children, and medical advances that may help prevent the fetus from becoming infected.
HIV阳性的女性如果想要怀孕，应当进行咨询，了解未出生婴儿的风险，以及如何使用药物来避免胎儿受到感染。
Late in the pregnancy, the fetus pushes up against the thoracic cage and decreases a woman's lung capacity, putting her at risk for respiratory complications if she contracts flu.
在怀孕后期，胎儿推挤胸廓，导致孕妇肺活量减少，这样当她感染流感后，就面临着呼吸并发症的风险。
Late in the pregnancy, the fetus pushes up against the thoracic cage and decreases a woman's lung capacity, putting her at risk for respiratory complications if she contracts flu.
在怀孕后期，胎儿推挤胸廓，导致孕妇肺活量减少，这样当她感染流感后，就面临着呼吸并发症的风险。
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