Moreover , the cdc found that placing three or more embryos in women with healthy eggs made them no more likely to get pregnant than placing two 而且疾病控制中心还认为对于有健康卵子的妇女移植超过2个胚胎的成功率并不能比移植2个胚胎更高。
Recently , primordial germ cells ( pgcs ) , which are the progenitors of the sperm or egg cells , have provided an alternative source of pluripotent stem cells 近年来，作为精子和卵子的祖细胞的原始生殖细胞( pgcs )已成为另一种可选择的多能性干细胞。
She questions those that object to allowing clients to screen photos and donor traits . such screening is already routine for people using just an egg or sperm donor , she says 她反驳那些反对她让顾客通过照片和供者特征筛选的人，她说这些筛选对于仅使用捐赠精子或卵子的人来说已经是常规。
In experiments ， an injection of cytoplasm from dextral eggs changes the pattern of sinistral eggs ， but an injection from sinistral eggs does not influence dextral eggs 在实验中，用取自右旋卵子的细胞质进行的注射，可改变左旋卵子的模式；用取自左旋卵子的细胞质进行的注射却不能影响到右旋卵子。
So do parents : ads for egg donors offer bonuses for blonds , and sperm banks in denmark are booming , thanks in part to demand for the country ' s natural blond donors 父母的态度也一样，寻求捐献卵子的广告对金发女子提供的报酬要高于一般标准。丹麦的精子库生意特别好，这在一定程度上是因为该国拥有天生金发的捐献者。
This course is designed to give the student a clear understanding of the pathophysiology of the menstrual cycle , fertilization , implantaion , ovum growth , development , differentiation and associated abnormalities 本科目乃设计来使学生能清晰了解关于月经周期、受精、着床、卵子的生长、发育、分化与相关异常性等方面之病理生理学。
The study of insect spermatozoa is far behind the ova for long time , it is mainly because the researchers concentrate more attention on the female insect that can product the posterity directly , but little on the function of the spermatozoa 摘要长期以来对于昆虫精子的研究远落后于对卵子的研究，这主要是由于研究者将注意力集中在能够直接产生后代的雌虫上，而对精子的作用认识不足，从而未能引起应有的重视。
Indeed , a number of complex chromosomal processes , such as mitosis ( cell division ) and meiosis ( the formation of sperm and egg precursors ) , as well as a range of complex genetic phenomena appear to depend on biochemical pathways that affect rna processing 事实上，许多复杂的染色体活动，像是有丝分裂（即细胞分裂）和减数分裂（以形成精子和卵子的前驱细胞） ，以及多种复杂的遗传现象，看来都需要仰赖影响rna处理的生物化学途径。
Ip3 is one of the key factors for ca2 + to release from calcium - storage and for oocytes to be activated . in this experiment , ip3 was guided into cytoplasm by instant holds on cell membrane which were made by electric stimulation , calcium - storage in cytoplasm was opened up with ip3s second messenger , and the effects of ip3 on artificial activation of oocytes was evaluated , with ca2 + waves of zygote being imitated 本实验利用电激活过程中卵母细胞膜上形成的瞬间孔洞，向卵子内导入一定量的ip _ 3 ，通过ip _ 3第二信使途径，打开胞内钙库，模仿自然受精过程中卵母细胞内ca ~ ( 2 + )的波动性变化，研究电场导入ip _ 3对小鼠卵子的激活作用。
In order to investigate the role of mannose receptor ( mr ) of human sperm , the zona free hamster eggs were pre - incubated with purified mr ( pmr ) isolated from motile human sperm by mannose - agarose gel affinity chromatography . the ultrastuctural alteration and cortical granule exocytosis of the eggs were then observed by transmissian electron microscope and tritc - lca immunofluorescence microscope , respectively . the mice were immunized with pmr and the antiserum was raised . after capacitation and induction of the acrosome reaction , the human spermatozoa and oocytes were incubated with the antiserum . then the sperm penetration assay was undertaken 为了进一步探讨人精于mr在精卵融合中的作用，本文采用改良后的甘露糖-琼脂糖凝胶亲和层析法分离纯化人精子mr ，并将提纯的人精子甘露糖受体( purifiedmannosereceptor , pmr )作用于去透明带的金黄地鼠卵母细胞，运用透射电子显微镜技术和罗丹明偶联的兵豆凝集素( tritc - lca )免疫荧光标记技术观察pmr对卵子的影响。
