sperm

But sperm don't have elaborate cells, just a tightly packed nucleus and a tail for swimming to the egg.

但是精子没有明确的细胞结构，只有一个紧密组装的细胞核以及一个便于游动到卵细胞的尾巴。

Starting with a person's own skin would also mean the lab-grown sperm or eggs would not be rejected by the body.

利用某人自身的皮肤进行制备也就意味着，这种实验室培养的精子或卵子不会遭人体排斥。

When I did try to gain just a touch of freedom by retracing a few steps, I felt like a sperm trying to swim the other way.

当我试图折回几步，享受一点点自由时，感觉就像一个精子试图调头游那么艰难。

Biologists have been trying to make sperm outside the body for almost a century.

将近一个世纪以来，生物学家都在尝试体外培育精子，却总是在减数分裂时期失败。

When this little baby grow up and that for her mother who donated sperm, that is, de facto father, love each other know each other.

当这个小婴儿洁莹长大后和那个为她母亲捐献精子的人，即事实上的父亲，相遇相知相爱。

while sperm can survive for several days inside a woman ' s reproductive tract , an egg can only survive for up to 24 hours after ovulation.

精子可以在女性生殖道内存活数日，而排卵后卵子仅能存活24小时。

Bone marrow cell micronucleus test and mice sperm abnormality test had negative results and there was no mutagenicity.

其小鼠骨髓细胞微核和精子畸形试验均为阴性，未显示出致突变性。

The result of this process is sperm cells ready to fuse with an egg.

减数分裂的结果就是使精子细胞和卵细胞结合。

Their study discovered that it did not matter if the man was fat or thin - such a diet had the same negative effect on sperm concentration.

他们的研究发现，男性不管是胖还是瘦，这种富含饱和脂肪的食物都会大大降低精子浓度。

The boy protested; he said he knew his sperm donor, who had a daughter of his own.

那个男孩反对说，他知道他的捐精者，他还有一个他自己的女儿。

He and his wife bought donor vials from a cryogenic sperm bank and he was inseminated at home.

比提与妻子从一个冷冻精子银行买回精子，并在家接受了“人工受精”。

In the course of a man's life, most of his sperm cells are ejaculated under conditions that offer no chance for a fertilization.

男性一生中，绝大多数的精子在无受精机会的情形下被射出。

Sperm ejaculated into a woman's vagina can live in a woman's reproductive tract for up to five days or perhaps even longer.

射入女性阴道的精子可以在女性生殖管道存活至多5天，甚至更久。

Robertson said sperm was more likely to fail if the woman had not previously been exposed to that man's semen for at least three months.

罗伯逊说，如果女方事先接触男方精液的时间达不到至少三个月，那么男方精子不能致孕的可能性更大。

She was created not out of the union of a sperm and an egg but out of the genetic material from an udder cell of a six-year-old sheep.

它不是精卵结合的产物，而是由取自一头六龄羊的乳腺细胞的基因材料生成的。

British scientists are ready to turn female bone marrow into sperm, cutting men out of the process of creating life.

英国科学家已经准备好把女性骨髓转化成精子，从而将男人从创造生命的过程中踢出去。

IVF is a method of assisted reproduction in which a man's sperm and a woman's eggs are combined outside of the body in a laboratory dish.

体外受精是辅助生殖的一种方法，在体外的实验器皿里让男性精子和女性卵子结合。

Your sperm count is still spot checked on each donation; if it's too low, you don't get paid for that deposit.

每次捐献之后，你的精子都要接受检测；如果数量太少，这次捐赠是不会付钱给你的。

"One possibility has to be that it altered the sperm . . . in motility, some increased risk of DNA damage, " she said.

“只有一种可能，在精子运动中，精子改变了，破坏了基因。”她说。

The real question is: how much heat kills sperm?

真正的问题是：高温多高会杀死精子？