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。
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.
你可以在胎动图表上记下分娩前胎儿的活动次数。
You can keep score of your baby's movements before birth by recording them on a kick chart.
在胎儿的下和中鼻甲粘膜中观察到动静脉吻合。
Arteriovenousanastomoses were observed in the inferior and middle turbinal mucosae of fetuses.
胎儿皮脂在婴儿的皮肤上形成，以保护其免受水环境的伤害。
Vernix caseosa has formed over the baby’s skin to protect it from its watery environment.
而那些营养充足的母亲怀的胎儿，正如我们看到的那样，不能预知营养不良的风险，因此在作出反应方面就不及前者。
Fetuses carried by well-nourished mothers do not, as it were, anticipate the risk of malnutrition, and thus respond to it less well.
研究者通过超声波发现，23周大的胎儿即开始在睡眠时快速移动眼球。
Studies using ultrasound have shown that fetuses exhibit REM sleep as early as the 23rd week of gestation.
那些图片比起在美国使用的小标签显示了更多对健康奇怪的影响，比如一幅带着吸烟可能导致流产警告的胎儿图片。
The pictures depict more grotesque health effects than the smaller labels recommended in the United States, including one showing a fetus with the warning that smoking can cause spontaneous abortion.
当胎儿在第一次接受刺激时，他被震惊。
When the fetus first receives the stimulation, it is startled.
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。
Many imaging tests are not performed during pregnancy so as not to expose the fetus to radiation.
在胎儿的位置，她会用勺子。
研究者认为，在怀孕期间，肠道细菌可能释放出影响胎儿脑发育的化合物。
During pregnancy, gut microbes may release chemicals that affect fetal brain development, the researchers say.
科学家们同意DHA在怀孕的后半期会自然地通过胎盘传输给胎儿，可能对视力和大脑发育有好处。
Scientists agree that DHA, naturally transmitted to a fetus through the placenta in the last half of pregnancy, is important, probably to visual and brain development.
她还指出，胎儿“在受到内分泌干扰时尤其的脆弱。”
Fetuses are "uniquely vulnerable, particularly for endocrine disruptors," she said.
在印度和其他地方，重男轻女的人们通常选择性堕胎剥夺女性胎儿的生存权。
A preference for boys in India and elsewhere leads to elective abortion of female fetuses.
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.
这种状况在日本尤为突出，上世纪90年代，日本男性胎儿的死亡率占所有胎儿死亡的三分之二。
In Japan, in particular, male fetuses accounted for about two thirds of all fetal deaths in the 1990s.
Courchesne说，神经元在胎儿生长期内产生，尤其是在第10周至20周之间。
Neurons are generated only during fetal development, specifically between 10 weeks and 20 weeks, Courchesne said.
该报告的作者推测，男孩在胎儿发育阶段可能对此类化学袭击反应更为敏感，这就可以解释为什么男孩比女孩更有可能出现行为问题。
The foetal development of boys may also be more sensitive to this kind of chemical assault, the authors speculate, which could explain why boys are more likely to have behavioural problems than girls.
这是胎儿形成过程中令人疑惑的挑战之一：在胚胎成长过程中，这种对称和不对称的组合是如何进化出来的？
It is one of the intriguing challenges of foetal development how this combination of symmetry and asymmetry evolves as an embryo grows.
当医生告诉她这个结果时，胎儿正在踢她的肚子，“我能看到我的肚子在动。”她回忆到。
As her doctor gave her the news, her baby kicked her and "I could see my belly move," she recalled.
胎儿时期的心脏在怀孕后22天左右后开始跳动。
The embryonic heart starts to beat around the 22nd day of pregnancy.
这项研究表明，妇女怀孕期间吸烟会对胎儿大脑的结构和功能发育造成损害，这种关系已经在动物身上得到验证。
The study suggests smoking while pregnant may damage the developing structure and function of the foetal brain, a link already demonstrated in animals.
我们无法知道胎儿是否有快乐或者悲伤的感觉，但是在伦敦做的一项新研究发现，小宝宝从第35周就能够识别痛感了。
It is impossible to know if an unborn baby can feel happy or sad, but a new study conducted in London has found a baby can distinguish pain from 35 weeks.
他找到了138例这样的双胞胎妊娠记录：一个胎儿在妊娠16周内死亡，另一个出生并存活下来。
He found 138 instances in which one twin died before 16 weeks' gestation and the other was born and survived.
根据2000年发表在《放射线学》一项研究，孕期第24周时，磁共振成像显示，在胎儿原本平滑的大脑皮层上出现了一些新的沟槽。
At 24 weeks, magnetic resonance imaging shows just a few nascent grooves in the otherwise smooth surface of the fetal brain, according to a 2000 study in the journal Radiology.
现行的相关法律颁布于1967年，规定只有在胎儿能成型存活，相当于28周孕期以后才可以终止妊娠。
The current law, passed in 1967, permitted abortion only until a fetus was "viable", which was assumed to be at 28 weeks.
你知道吗？虽然你的心脏和你攥紧的拳头差不多大小，但是当你在胎儿时期，你的心脏有你现在拳头的十倍之大。
Although your heart is the size of your closed fist throughout your life, your embryonic heart is about nine times larger than your developing fist.
胎儿皮脂——白色的干酪质的物质——已经在婴儿表面形成了，它可以保护婴儿免受水环境的影响并帮助婴儿舒适地通过产道。
Vernix caseosa a white cheesy substance has formed over the baby’s skin to protect it from its watery environment and to help ease her through the birth canal.
一位研究人员指出，你在亲吻爱人时多半会把头转向右侧，这是一种胎儿期偏好的影响。
When you kiss your sweetheart you may well turn your head to the right, echoing a preference born in the womb, a researcher suggests.
一位研究人员指出，你在亲吻爱人时多半会把头转向右侧，这是一种胎儿期偏好的影响。
When you kiss your sweetheart you may well turn your head to the right, echoing a preference born in the womb, a researcher suggests.
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