多年来,私人资金已用于制造胚胎干细胞系,绝大多数是从妇产科医院丢弃的胚胎中制造出来的。
她说,一个想要一夜情的男人潜意识地会去看女人的腰围,来判断她的生育能力。
研究人员并不清楚这项化学物质是如何降低生育能力的。
生育护理中心的负责人SimonFishel说,这次里程碑的技术标志着“伟大的人类智慧”。
报告的另一项发现是,在摩洛哥和土耳其向欧洲输出劳动力的地区,生育率有所下降。
既有具体描述、便于检测评定的参照性,又有在教学中付诸实践、谋求达成的可行性。
沃尔什说,可能存在生育问题的男性不必对癌症产生恐慌。
婴儿出生率往往会随着经济的发展而有所下降,中国目前的出生率仍然高于英国在内的许多欧洲国家。
ART主要的进展集中在通过应用生育药物使妇女产生可操作的卵子。
但是塞尔维亚有着欧洲老年人口最多和低出生率,所以人口每年缩小3万人。
低生育能力的定义为:以生育为目的的无防护性生活超过一年,仍没有怀孕。
九个月前,亨德里克斯交给哈林顿——一个他认识了很久的朋友一小罐精子,让她带去给医生进行人工受精。
男人只需坐在女人身边几分钟,就能辨出她是否处于排卵期,这似乎很难让人相信。
治疗高血压的钙离子通道阻断剂和治疗关节炎的药物都可能影响生育能力。
法国是三个出生率超过神奇的更替水平的欧洲国家之一(其余两个是丹麦和爱尔兰)。
“高脂乳制品食物竟与生育有关,这确实有点令我们惊奇,”他说道。
原始社会是人类生育的自然阶段,并无权利和义务之分。
他们尝试了四年,这时艾米丽终于受不了了,他们谈论起医治生育能力或抱养个孩子的问题。
但一个没有生育能力的人克隆的下一代还会没有生育能力。
结论:采用人尿激酶免疫雄性小鼠后雄鼠交配能力无明显改变但是生育能力显著下降。
他希望他的实验能剔除狗身上的一种特别的雌激素受体借以理解激素对生殖力的影响。
这一策略不仅表明了她的思想富于创造性,也显示了她的大胆和果断的性格。
一些人口统计专家却认为,如今急剧下降的出生率以及快速形成的老龄化社会是尽快叫停这项政策的原因。
根据其中一项研究结果显示,接受计划生育的地区其生育率比未接受的地区降低的比例多15%。
研究发现一种含有抗氧化剂和维生素的复合制剂可能显著提高男性的生育力。
伯托尔德•威斯纳与妻子玛丽•巴顿20世纪40年代在伦敦开设了一家生育诊所,帮助前来就诊的女性孕育了1500名后代。
1·Natural soil fertility is dropping in many areas because of continuous industrial fertiliser and pesticide use, while the growth of algae is increasing in lakes because of the fertiliser run-off.
在很多地区,由于工业化肥和农药的持续使用,导致自然土壤的肥力正在下降,然而化肥的流入却导致湖泊中藻类生长得越来越快。
2·Crop rotation is a simple and effective technique used in organic agriculture to reduce the need for pesticides and improve soil fertility.
轮作是应用于有机农业上的一种简单而有效的技术,能减少农药的使用和提高土壤肥力。
3·As importantly, biochar improves fertility in a wide variety of tropical soils. Beneficial micro-organisms seem to crowd into the pores of the small pieces of crushed charcoal.
同样重要的是,由于有益微生物似乎会聚集到小块木炭碎料的孔洞中,“生物碳”还可以改善各种热带土壤的肥力。
4·Bed planting improves soil fertility and structure and helps reduce erosion, water usage, herbicide use and facilitates mechanical and manual weeding.
垄播改善了土壤肥力和结构,对减少流失、水的利用和除草剂的施用也有帮助,也方便了机械和人工除草。
5·The best bit, according to Rademakers, is that adding the 'char' to poor soil dramatically increases its fertility, so the world could kill two birds with one stone.
最棒的一点是,Rademakers说,如果将得到的“生物炭”加入到贫瘠的土壤中可以大幅度地提高它的肥力,这对全世界真是一石二鸟。
1·By some studies, the safety nets for retirees have reduced fertility rates.
一些研究表明,退休人员的社会保障体系使生育率降低了。
2·To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.
为了做出更准确的人口预测,人口统计学家必须比现在更多地了解生育率的社会和经济决定因素。
3·With its fertility artificially suppressed by the one-child policy, it is ageing at an unprecedented rate.
由于其生育率被独生子女政策人为地压低,它的老化速度也是史无前例的。
4·The link between living standards and fertility exists within countries, too.
国家内部的生活水平和生育率也存在联系。
5·The odd ones out are America and Britain, which both have lots of women at work and fertility rates close to replacement level (with immigration making up the rest).
美国和英国则是例外,它们都有大量工作妇女,且生育率接近替代水平(不足部分有移民补充)。
1·Rather, they should face a “slope of death” that rises as their fertility falls.
不如说,在他们生育力减退时面对的是“死亡斜坡”。
2·The other, surprising Europe is a place of recovering fertility and rising population.
另一部分,令人惊讶的欧洲是恢复生育力和人口增加的地区。
3·Whether this test will actually encourage a shift in the way men view their role in fertility testing, only time will tell, she says.
她说,这一测试到底会不会改变男性对自身在生育力检查中角色的成见,或许只有时间才会给出最好的回答。
4·Dr Marina Singh is sent into the Amazon to investigate the progress of a fertility study that her mentor from medical school, Dr Annick Swenson, is conducting in secret.
玛丽娜·辛格博士被派往亚马逊调查一项生育力研究的进展状况。该项研究由他在医学院的导师安妮克·斯文森博士秘密进行。
5·Soon after, she started noticing fertility ads on sites she visited.
随即,她开始留意到生育力广告在其访问的站点上显现。
1·Nature and fertility would have been all-important; they would have worshipped sun gods, water gods, moon gods and doubtless bison gods.
自然和肥沃是最重要的;他们崇拜太阳神、水神、月亮神,无疑还有野牛神。
2·That is true, he said, whether the goal is restoring fertility to African soil or building a system to warn of tsunamis.
他说,事实就是如此,不论我们的目的是恢复非洲土地的肥沃还是建立一个海啸预警系统。
3·According to Kramer, Haiti's problem isn't lack of soil fertility, but lack of soil itself. "Deforestation erodes whole layers of soil into the ocean every year."
克雷默表示,海地目前的问题不是缺少肥沃的土地,而是缺少土地,“每年,滥伐森林都把土地的整个土层都冲刷到了海里。”
4·That is when the Nile River flooded its Banks, bringing water and fertility to the land.
那时,尼罗河的河水淹没了河岸,河水带来了水源并肥沃了两岸的土地。
5·These unusual beauty contests, known as Gerewol, celebrate the fertility the rains bring to the parched edge of the Sahara.
这个非比寻常的盛会,叫做“格莱·沃尔节”,是为了庆祝雨水冲走撒哈拉的炎热后带来的短暂肥沃而举办的。
1·Combining cell morphology, the growth and decline state of tapetum in anther wall tissue are closely related with pollen fertility and amino acid metabolism.
结合细胞形态学观察,药壁组织的绒毡层的发育与解体状况和花粉育性、氨基酸代谢有着密切关系。
2·During the study on CMS of radish, the fertility instability was found.
在对萝卜cms研究过程中,发现了育性不稳定现象。
3·GENESIS has little effect to the pistil fertility.
GENESIS对雌蕊育性几乎没有影响。
4·Female and male fertility decreased greatly and even vanished thoroughly. Only 5 regenerated plants produced seeds with low frequency. I-KI stainable pollen ranged from 0 to 68%.
雌、雄性育性显著降低或完全不育,仅有5株能够少量结实,I - KI溶液着色的花粉从0至68%不等。
5·The main mutant-types induced by EMS were ear visibles, seed visibles, stem visibles, leaf character mutation, fertility mutation and mature period mutation.
EMS诱变产生的主要突变类型有:穗部形态突变、籽粒形态突变、茎秆形态突变、叶片性状突变、育性突变及熟期突变等。
1·Snakes are symbols of renewed life and fertility in the East; because they shed their skins so they seem to be eternally young.
在东方,蛇一般都是新生命和多产的象征;因为蛇的蜕皮似乎能使它永远年轻。
2·Christine Drea: it not only affected the chemical signals of fertility but it also obliterated the signals of an animal's individual identity.
克里斯汀·迪亚:这不仅影响了某些能诱发多产的化学信号,也截断了某些能显示动物个体特性的信号。
3·The wishbone shape itself is good luck symbol of life and fertility.
如愿骨的形状本身也是表示生命和多产的幸运符号。
4·The black soot over the body might be remnants of materials mixed for mummification, while the black paint on the face was associated with fertility and birth.
身体上面的黑色碳化部分可能是制作木乃伊时的材料的遗留,然而在其脸部黑色的绘画与多产和出生有关联。
5·This phenomenon is more exhilarating to me than the luxuriance and fertility of vineyards.
这一个现象给我的欣喜,更甚于一个丰饶多产的葡萄园。
1·And Abram in high price for the part of the common people, and the strong love fertility will sell toward the varieties with low price and sold more than money.
高价兰、中价兰中的部分为群众所共同喜爱的,繁殖力强的品种也会走向热销的低价兰,以低价多售赚钱。
2·That's a symbol of fertility.
这是繁殖力的象征。
3·Implement early weaning piglets, is to enhance the sow an effective measure of fertility.
实行仔猪早期断奶,是提高母猪繁殖力的一项有效措施。
1·He wrote: Collating old records shows that our greatness rises and falls with the living fertility of our soil.
他写道:对旧记录的整理表明,我们的伟大是随着我们土壤的丰饶而起落的。
2·It symbolizes growth, harmony, freshness, and fertility.
它是生长、和谐、新鲜和丰饶的象征。
3·The critic David Sylvester was one of many who saw something almost menacing in its form – "the sacrificed and resurrected god of a fertility rite".
批评家大卫·西尔维斯特也是看出摩尔作品中表现凶险的人之一——“一个丰饶仪式的牺牲和复活之神”。
4·The metaphor of Diana as goddess of fertility runs through the play, and with the arrival of Ruth the family reconstruction is accomplished and the spiritual rebirth is realized.
丰饶女神黛安娜的隐喻贯穿全剧,伴随着露丝的到来,最终完成了家庭秩序的重建和精神荒原中新质的萌生。