首页
登录
职称英语
The idea of test-tube babies may make you either delighted at the wonders of
The idea of test-tube babies may make you either delighted at the wonders of
游客
2025-01-23
9
管理
问题
The idea of test-tube babies may make you either delighted at the wonders of modem medicine or irritated while considering the moral, or legal, or technological implications of starting life in a laboratory. But if you’ve ever been pregnant yourself, one thing is certain: You wonder what it’s like to carry a test-tube baby. Are these pregnancies normal? Are the babies normal?
The earliest answers come from Australia, where a group of medical experts at the Queen Victoria Medical Center in Melbourne have taken a look at the continent’s first nine successful
invitro
pregnancies. The Australians report that the pregnancies themselves seemed to have proceeded according to plan, but at birth some unusual trends did show up. Seven of the nine babies turned out to be girls. Six of the nine were delivered by Caesarean section. And one baby, a twin, was born with a serious heart defect and a few days later developed life-threatening problems.
What does it all mean? Even the doctors don’t know for sure, because the numbers are so small. The proportion of girls to boys is high, but until there are many more test-tube babies no one will know whether that’s something that just happened to be like that or something special that happens when egg meets sperm in a test tube instead of a fallopian tube. The same thing is true of the single heart defect. It usually shows up in only 15 out of 60,000 births in that part of Australia, but the fact that it occurred in one out of nine test-tube babies does not necessarily mean that they are at special risk. One thing the doctors can explain is the high number of Caesareans. Most of the mothers were older, had long histories of fertility problems and in some cases had had surgery on the fallopian tubes, all of which made them likely candidates for Caesareans anyway.
The Australian researchers report that they are quite encouraged. All the babies are now making normal progress, even the twin with the birth defects. [br] Which of the following explanations regarding the high number of Caesarean operations is NOT true?
选项
A、Some mothers have passed the best age for a natural delivery.
B、Some mothers have fertility problems.
C、Some mothers favor the operations of this type.
D、Some mothers have had surgical operations on their fallopian tubes.
答案
C
解析
根据第三段最后一句Most of the mothers were older, had long histories of fertility problems and in some cases had had surgery on the fallopian tubes, all of which made them likely candidates for Caesareans anyway.可知答案是C项。
转载请注明原文地址:https://tihaiku.com/zcyy/3925990.html
相关试题推荐
Oldageisneitherinherentlymiserablenorinherentlysublime—likeeverystag
它已经推出了一些既不依赖英国宽松的税收政策,也不依赖海外富豪的产品。(neither…nor…)Italreadyofferssomeproducts
Theideaoftest-tubebabiesmaymakeyoueitherdelightedatthewondersof
Theideaoftest-tubebabiesmaymakeyoueitherdelightedatthewondersof
Evidencecameupwhichspecificspeechsoundsarerecognizedbybabiesasyoung
Wearedelightedtoestablishbusinessrelationshipwithyou.A、beestablishedB、
Virtuallyeverytheoryhasbeenconcernedwitheitherthestructureorthefunct
Wearedelightedtoestablishbusinessrelationshipwithyou.A、beestablishedB、
Iknewnothingofthemotivesbehindhisrecentmove,andIdon’tknoweitherth
Virtuallyeverytheoryhasbeenconcernedwitheitherthestructureorthefunct
随机试题
BiancaSforzaattractedfewstareswhenintroducedtotheartworldonJanua
[originaltext]Whilethenicknamesofcurrenthurricanes—includingEarlan
SinceWorldWarII,allnationsoftheworldhaveshownagreatinterestin
[originaltext]M:I’veheardthemodernartexhibitionintheuniversitymuseum
BuckinghamPalaceis______’spresentLondonhome.A、parliamentB、churchmenC、m
简答所有权的法律特征。
超声心动图诊断主动脉瓣重度狭窄的指标是A.瓣口面积
证明
患者,女,67岁,患2型糖尿病21年。社区护士入户体检时发现下肢水肿,遂到门诊查
某天,自行车运动员小吴训练了3个小时,他先匀速骑行了一段上坡路程,又以2倍的速度
最新回复
(
0
)