Pregnant women who are heavy drinkers risk damaging the unborn fetus.
酗酒的孕妇冒有伤害胎儿的危险。
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。
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。
The lungs of a fetus secrete a liquid that mixes with its mother's amniotic fluid.
胎儿的肺部会分泌一种能与母亲的羊水混合的液体。
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。
Studies of animals, for example, have shown that when a rat experiences stress during pregnancy, it can cause epigenetic changes in a fetus that lead to behavioral problems as the rodent grows up.
例如，对动物的研究表明，老鼠在怀孕期间经历压力会导致胎儿表观遗传发生变化，进而导致啮齿动物在成长过程中出现行为问题。
There be certain chemicals in fertilizers used to crop-dust cotton that affect the unborn fetus.
作物粉尘中使用的化肥中有某些化学物质会影响胎儿。
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。
FOOD and oxygen pass easily from mother to fetus.
食物和氧气很容易从妈妈身体传递给胎儿。
Your baby has left the embryo stage and is now a fetus.
婴儿现在已经脱离了胚胎阶段进入了胎儿期。
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。
And she must also listen to a description of the fetus.
她也必须听从对胎儿的描述。
At least in the case of the fetus, it's not self-conscious.
至少在作为胎儿，并没有自我意识。
When the fetus first receives the stimulation, it is startled.
当胎儿在第一次接受刺激时，他被震惊。
Mercury is a potent neurotoxin that can harm a developing fetus.
汞是一种很厉害的的神经毒素，可以伤害到发育中的胎儿。
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 can also harm a developing fetus if a woman drinks to excess while pregnant.
如果怀孕的妇女过量饮酒会影响胎儿的发育。
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。
The fetus diverts the reduced blood supply to its brain and heart and away from its limbs.
胎儿转移他四肢的血液流向大脑和心脏，以应对血液供应减少。
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。
Drinking can harm a developing fetus, putting a baby at risk for birth defects and mental problems.
饮酒会伤害腹中发育中的胎儿，可能会带来先天缺陷和精神问题。
Most notably by the end of this week your baby will no longer be an embryo but will be considered a fetus.
这周末你的婴儿很明显已经不再是一个胚胎了，可以被看作胎儿了。
Compared to most mammals, human females give birth to a fetus, and it stays helpless a very long time.
与大多数哺乳动物相比，人类女性生育和保持胎儿处于无助的幼年期的时间更长。
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。
Most notably, by the end of this week, your baby will no longer be an embryo, but will be considered a fetus.
这周末你的婴儿很明显已经不再是一个胚胎了，可以被看作胎儿了。
Most notably, by the end of this week, your baby will no longer be an embryo, but will be considered a fetus.
这周末你的婴儿很明显已经不再是一个胚胎了，可以被看作胎儿了。
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