In human reproduction,one female egg is usually fertilized by one sperm.

在体生殖过程中,一个精子使一个卵子受精。

The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.

精子产生于输精管壁的性母细胞（精原细胞）。

All bdelloid rotifers are female, and they make embryos without any need for sperm.

所有的蛭形轮虫都是雌性，而且牠们不需要精子就可以产生胚胎。

Syngamy - The fusion of egg and sperm cells into a zygote.

Syngamy -融合卵和精子细胞成受精卵。

The release time of apyrene sperm was early than that of eupyrene sperm.

无核精子的释放时间早于真核精子束。

When he judges it is safe to do so, he inserts the end of a pedipalp into the female's reproductive opening and discharges the sperm it carries.

当它确定安全时，便将须肢末端插进母蜘蛛的生殖孔中并放出它所携带的精液。

Purpose and Methods: In order to characterize the antimutagenic effect of seaweed polysaccharides(SP), the mouse bone marrow micronucleus test and mouse sperm malformation test were conducted.

本小鼠骨髓嗜多染红细胞微核试和小鼠精子畸形试,海藻多糖的抗突变作进行研究。

The mutation potential of ethephon was by investigated the micronucleus test of bone marrow polychromatophilic erythroblasts (PCE) cells and sperm shape abnormality test in mice.

摘要为测定乙烯体健康的影响，采小鼠骨髓细胞微核试和小鼠精子畸形试分别检测了乙烯小鼠体细胞和生殖细胞的致突变性。

He is good at urology diseases such as prostate hyperplasia, acute or onic prostatitis, difficult prostatitis, impotency, prospermia, ED, Stds, deficiency of sperm, male sterility.

尤其擅长于男性疾病诊断和治疗，采中西医结合的综合治疗措施，治疗前列腺增生、急慢性前列腺炎、难治性前列腺炎、阳痿、早泄、性功能障碍、性传播疾病、少精子、弱精子、精液不液化、特发性男性不育等疾病，方法独特、疗效显著。

In the adult, or medusa stage of a jellyfish, they can reproduce sexually by releasing sperm and eggs into the water, forming a planula.

在海蜇成体或水母体阶段，它们通过将精子和卵于释放到水中形成浮浪幼体而进行有性繁殖。

Micrococcal nuclease treatment indicates that the remodeling of the demembranated sperm chromatin has occurred and the structure of nucleosome is formed during nuclear reconstitution.

同时，小球菌核糖核酸酶处理的结果表明，去膜精子在此非细胞体系中发生了结构改建并且在重建过程中形成了核小体结构。

Meanwhile, males of the species Moroteuthis ingens were found to have sperm packets that, once deposited onto a female, burrow into the body.

“（南洋力士钩鱿的）精荚可以独立的渗入皮下”，霍说，“这是因为精荚分泌的一种酶能溶解鱿鱼的身体组织。”

Objective To investgate the treatment of asthenospermia and necrospermia infertility with percutaneous vasal sperm aspiration ( PVSA) and intrauterine insemination ( IUI) .

目的探索采经皮穿刺输精管吸精子(PVSA)行宫腔内工授精(IUI)的方法治疗极弱精子症或死精子症不育患者。

Abstract： Aim:To establish the methods of microfertilization and explore the fertilizing potential of mouse sperm obtained from caput epididymidis and cauda epididymidis.

摘 要： 目的:建立显微受精的方法，并探讨小鼠附睾精子在显微注射进入卵母细胞后的受精能力。

To a certain degree, sperm head membrane maybe is the key factor to the androgenesis of the gynogenetic silver crucian carp eggs.

在某种程度上表明：精子膜蛋白可能是雌核发育银鲫卵子进行雄核发育的关键因素。

The presence of immotile sperm or sperm shaking in place and not demonstrating forward motion is suggestive of immunologically related infertility.

如果存在非运动精子或原地摆动但不向前运动的精子要考虑免疫因素引起的不孕。

The sperm morphology analysis using semiautomated sperm morphology analyzer (ASMA) was performed.To analyze Ureaplasma urealyticum, the culture method was used.

采计算机自动检测系统下工修正方法进行精子形态分析，计算机自动分析精子密度、活率、活力等精液参数。

The acrosome in the head was spheral in shape, and there was only one mitochondria in the mature sperm.

核染色质凝集成团块状，中部不发达，线粒体融合成1个环绕中部。

Only one sperm fertilises an egg.

只有一个精子使卵子受精。