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.
根据杜克大学辐射安全部门的说法，快速的组织如胚胎和胎儿对辐射更加敏感。
According to Duke University's radiation Safety Division, rapidly dividing tissues - an embryo or fetus is a good example - are more sensitive to radiation.
新的研究准备探索胚胎发育领域，看怀孕期间接触双酚a是否会对胎儿发育产生毒害作用。
New studies are looking to embryonic development, to see whether BPA exposure during pregnancy is having any deleterious effects on development.
内层细胞形成扁圆形的胚胎盘，拍胎盘将会发育成胎儿。
The inner cells form a flattened circular shape called the embryonic disk, which will develop into a baby.
婴儿现在已经脱离了胚胎阶段进入了胎儿期。
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。
Most notably by the end of this week your baby will no longer be an embryo but will be considered a fetus.
但是这种试验破坏人类胚胎，因此保护胎儿生存权利运动者反对。
But such experiments destroy human embryos, so right-to-lifers object.
绒毛取样需要从胚胎中取出遗传物质样本，有百分之一的可能导致流产，所以一般只有在胎儿患病风险很高的情况下才会使用。
The latter tests take samples of genetic material from the foetus but they carry a 1% risk of miscarriage and are therefore reserved for high risk pregnancies.
胎儿：人类从开始怀孕的第八个星期到出生这一期间的有别于更早期的胚胎的幼儿。
Fetus: in human beings, the unborn young from the end of the eighth week after conception to the moment of birth, as distinguished from the earlier embryo.
到了第五天，胚胎形成一个液囊，然后胚盘和胎儿开始分化。
By the fifth day, a fluid cavity forms in the embryo, and the placenta and fetal tissues begin to separate.
胚胎学：研究胚胎和胎儿的形成和发育的学科。
Study of the formation and development of an embryo and fetus.
在哺乳动物和有关它们繁殖的生理学与胚胎学之间存在太多的差异，因而不能保证不会生出畸形的胎儿或婴儿。
There are too many differences between mammals and their reproductive physiology and embryology to be sure that no deformed foetus or infant would be born.
第八周结束标志着“胚胎期”的结束和“胎儿期”的开始。
The end of the eighth week marks the end of the "embryonic period" and the beginning of the "fetal period".
胚胎发育成胎儿。
在此过程中，外界环境中多种因素的影响都可能导致胚胎死亡或是胎儿畸形。
In such a process many environmental factors can lead to the death of embryos or malformation of fetuses.
小白鼠胚胎时期，肾上腺皮质由永久皮质和胎儿皮质两部分组成。
During fetal period the adrenal cortex consists of fetal cortex and permanent cortex.
结果分别获得了传16代的胎鼠成纤维细胞和传7代的人胎儿成纤维细胞，建立了人胚胎干细胞饲养层的培养体系。
Results Acquired 16 passages in mouse and 7 passages in human and established the culture system of human embryonic stem-like cells.
在胚胎发育期，胎儿通过新血管化过程(其内皮细胞源于祖细胞)和新生血管形成过程(新血管由旧血管芽生而来)生成毛细血管。
During embryogenesis, capillaries develop in the fetus by neovascularization, where endothelial cells arise from progenitor cells; and angiogenesis, in which new blood vessels sprout from old ones.
胚胎(胎儿)发育是遗传信息和环境因素相互作用的编程过程。
The development of embryo and fetus is a programmed process by which one's genotype interacts with the environment to produce its phenotype.
健康的胚胎发育成胎儿。
胎儿肝脏在胚胎早期和中期均有造血功能。
The fetus liver has blood forming function at the early and middle stages of the fetus development.
胎儿，是指妊娠8周以后娩出的胎体。妊娠4 ~8周娩出的胎体为胚胎。
The fetus, refers to eight weeks of pregnancy after childbirth carcass. 4-8 weeks of pregnancy the carcass for embryo themselves.
生长八周之后，现在的胚胎看起来更加像一个小人儿了，这个时候的胚胎已经可以称为胎儿，拉丁语就是子孙的意思。
After growing for eight weeks, the embryo looks more like a tiny human and becomes known as a fetus which in Latin means offspring.
胚胎学：研究胚胎和胎儿的形成和发育的学科。
To cause the expulsion of(an embryo or fetus)before it is viable.
胚胎干细胞是来源于附植前胚胎的内细胞团或附植后胎儿的原始生殖细胞具有发育全能性的细胞。
Embryonic stem cell is a kind of undifferentiated pluripotent stem cell, which stems from pr Eimplantation ICM or early fetus primordial germ cell.
DNA甲基化是一种主要的表观遗传修饰，对于胚胎发育、胎盘及胎儿的生长具有重要作用。
DNA methylation is a major epigenetic modification and plays a crucial role in embryonic development and placentas 'development.
目的观察正常胚胎及胎儿各期肌肉及神经的发育，作为研究幽门病理状态的基础。
Objective To study the neural and muscular development of pylorus through different gestational stages.
目的观察正常胚胎及胎儿各期肌肉及神经的发育，作为研究幽门病理状态的基础。
Objective To study the neural and muscular development of pylorus through different gestational stages.
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