一个8周大的胎儿仅1英寸长。
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.
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.
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.
不仅婴儿和新生儿有呵欠行为，就连12 -14周的胎儿也会打呵欠。
It has not only been observed in infants and in newborns, but also in fetuses of 12-14 weeks' gestational age.
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.
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.
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.
戴妮拉。麦克莱恩，现年28岁，在告知老板自己怀孕前，已怀孕13周，扫描仪上已能够看到胎儿。
Danniella McClain, 28, waited until she reached the 13-week milestone and had seen the foetus on a scan before telling her boss.
他和他的同事应用适应实验去检查30- 38周龄胎儿的记忆。
He and his colleagues used the habituation tests to examine memory in fetuses 30 to 38 weeks old.
但14周后，悲剧发生了。医生发现两胎儿脐带纠结在一起，于是切断了彼此的血液供给，最终导致胎死腹中。
But then tragedy struck at 14 weeks when doctors discovered the twins umbilical cords had become tangled, cutting of each other's blood supply, causing them both to die in the womb.
科学家比较了之前已测试过和之前没有测试的38周龄胎儿的反应。
The scientists compared the response of the 38-week-old fetuses who had been tested before with that of fetuses who had not been tested before.
现在一项新的研究由荷兰，科学家在胎儿30周时发现胎儿具有短期记忆。
Now in a new study from the Netherlands, scientists have found fetal short-term memory in fetuses at 30 weeks.
爱达荷州近来禁止在20周龄以后终止妊娠，而据报道，McCormack的胎儿有5到6个月大。
Idaho recently banned abortions after 20 weeks, and McCormack's fetus was reportedly between five and six months old.
今天北达科他州参议员们批准的法案要求通常是在怀孕六周，当胎儿被检测出心跳的时候禁止堕胎。
North Dakota senators approved the bill today that would ban abortions when a fetal heart beat is detected, usually by six weeks in the pregnancy.
报告中写道：“可以推论，胎儿在24周孕期之前不会感受到任何疼痛。”
The report said: "It can be concluded that the foetus cannot experience pain in any sense prior to this gestation."
他们就其应激水平询问了这些妇女，同时记录了胎儿的运动状况。妇女生产后两周，他们又检查了婴儿。
They asked the women about their stress levels and recorded fetal movements. They also examined the babies two weeks after birth.
孕妇离足月尚早(小于32- 34周妊娠)，住院后病情改善，没有明显终末器官功能障碍或胎儿不好则是例外。
Exceptions may be made for women remote from term (less than 32 to 34 weeks of gestation) who improve after hospitalization and do not have significant end-organ dysfunction or fetal deterioration.
最终我们以母体的状态和诊断时胎儿的孕周为母体提供个性化服务信息。
Finally, we provide information regarding maternal counseling based on maternal condition and fetal gestational age at time of diagnosis.
胎儿同样可以检测到快动期。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。
Fetuses also experience REM sleep. Studies using ultrasound have shown that fetuses exhibit REM sleep as early as the 23rd week of gestation.
从第24周到足月，胎儿的新磁图描记术除了记录胎儿的呼吸外，还记录其身体和嘴巴的整个活动。
Fetal MCG recordings of body and mouth movements in addition to breathing were noted from 24 weeks to full term.
去年发表的一项研究指出，平均一周喝一罐半啤酒的孕妇所生的胎儿会受到很小但是很明显的影响。
One study, published last year, found a small but significant effect on average in children born to women who consumed just a drink and a half a week.
孕11 - 13 +6周胎儿颈项透明层(NT)厚度已经成为早孕期筛查唐氏综合征的重要指标。
In 11-13 + 6 weeks, fetal nuchal translucency (nt) thickness has become an important index of down's syndrome of early pregnancy screening.
他们还发现34周大的胎儿能够存储信息四周并回忆起。
They also found that 34-week-old fetuses can store information and retrieve it four weeks later.
如果你年过35岁，胎儿过大，或怀孕超过40周，VBAC对你而言仍然是安全的，但是这些情况还是会降低你自然分娩的机会。
VBAC is considered safe if you are older than 35, you have a large fetus, or your pregnancy goes beyond 40 weeks. But these things do lower your chance of being able to deliver vaginally.
方法： 应用二维超声对194例胎龄在36～43周的胎儿肾上腺纵切面积（FAGA） 进行测量，然后随访其母亲分娩期的情况。
Methods:The fetal adrenal gland area(FAGA)was measured with ultrasonography in 194 fetuses at 36 43 weeks of gestation and pregnancy outcomes were followed up.
结果：胎儿外耳在孕20周以后即可清晰显示其形态、大小及位置。
Results: the morphology, the size and the lie of the fetal external ear could be clearly seen after 20 week pregnancy.
应该是准的，18周时胎儿的性别特征已经很清楚了。
Should be prospective, and 18 weeks when the fetus gender identities are already very clear.
孕12周后，因胎儿身体屈曲，以胎儿顶臀径推算孕龄已不够准确。
The crown-rump length becomes less accurate after 12 weeks in determining gestational age because the fetus begins to curve.
在双绒毛膜双胎妊娠中，如果其中一个胎儿在26周仅重320克，发生宫内死亡风险很高时，我们通常会建议推迟产妇的分娩时间。
In a dichorionic pregnancy, if a co-twin weighs 320 g at 26 weeks and is at high risk of in utero death, we typically would advise the parents to delay delivery.
应用推荐