Choose the test tube baby of egg cell carefully born to make the mankind lose weighing apparatusing first?

Choose the test tube baby of egg cell carefully born to make the mankind lose weighing apparatusing first?
All sift out " L The outstanding baby " R Will make the mankind out-of-balance? It is born to choose the test tube baby of egg cell carefully first
Is infertile sterility person's liberator in vitro fertilization? Most people think so . Seem that so long as train and feel better the precise ovum, and then send into mother's body, everything is settled. But in fact, even a lot of women accept that is fertilized the ovum, can't become pregnant smoothly either - -This is because egg cell that is used for being fertilized sometimes is defective.
According to Britain>Report on September 2, British researchers pass a kind of special egg cell chromosome screening technology, successfully " L Filter " R Having lost the egg cell with chromosome defect, it is pregnant to let many women unables to be pregnant the past rely on test tube baby's technology. This modern manpower assists the new technology of reproduction, has already obtained British mankind's fertilizing and embryo's administration bureau (HFEA) Approval,may infertile sterile patient bring to whole world's by good news.
Two months ago, one of the next healthy boy babies of British woman's birth, was named Oliver. The arrival of the little life lets the doctors let out a sigh of relief - -This pair of married couple has been already diligent for more than ten years in order to get a child.
This person annual 41 -year-old woman go through, miscarry twice once, accept 13 times receive precise outside the body now, but nothing succeeds . Finally, her Nottingham in lying in England accepted the detailed inspection, the doctors found finally, the previous ovum that she offered had a chromosome defect, it is very difficult to go through the course of proliferating, splitting up etc. like healthy embryonated egg after being fertilized. After obtaining the consent of husband and wife, the doctors decide to adopt the latest egg cell to screen the test tube and is fertilized technology, this woman becomes the first person who accepts this technology in the world too.
Including little Oliver's mother, 20 women have accepted this kind has been called in the whole Great Britain at present " L The comparative genome of the microarray is hybridized(aCGH) " Help of technology, succeed in, become pregnant rate up to 30%, such new the intersection of manpower and auxiliary the intersection of reproduction and technology enjoy a widespread reputation immediately too. Then, what let a already ripe ordinary test tube fertilized technology and failed? How did researchers screen egg cell outside the body?
" L Sift " R The health egg cell happens
To put it briefly, it is to offer a sperm the environment in combination with ovum initial stage outside the body that the test tube is fertilized technology, treated the development of embryonated egg after certain stage, and then sent it back to parent's uterus, such situations as the low, oviduct is blocked that this kind of technology is generally suitable for sperm's survival rate. But it is not omnipotent that the test tube is fertilized technology, Britain bears a copy of data that the association announces to reveal, there are the chance of success that young test tubes of women are fertilizeds only 25- 30% , More than 40 years old women even drop to 13%. Mankind's infertile sterile reason is too complicated, it may be the reproductive system obstacle, or the development question of the embryonated egg, it also may be a hereditary question.
The last kind of situation is most difficult to deal with, this is that that British woman accepts numerous test tubes are fertilized technology too, reason to still fail. Because of the carriers of the hereditary material - -The chromosome has defects, it is difficult to be effective to make the ordinary test tube fertilized technology. If you want to become pregnant successfully, must try every possible means to exclude the defective egg cell.
In order to check whether the chromosome of an egg cell is unusual, researchers cut a small mouth outside the egg cell on the membrane with the laser, collect body very much through the small mouth ' Structure which the chromosome group forms in the egg cell) ,Then adopt the computer detection technique and check whether the chromosome included by it is normal. Behind selecting the healthy egg cell, and then fertilize the procedure the ordinary test tube, can make women succeed in becoming pregnant .
Offer Britain of financial support for correlation technique " L Bear and organize in Cali " R Executive director Simon and # 8226; Fisher introduces, it is very common in women that the chromosome of egg cell is unusual, young women reach over half the egg cell, 39 75% of the egg cells of women's all exist unusually, and the genetic defect of embryo up to eighty-percent was just unusually caused by the chromosome of egg cell. Fisher says, this new technology may make the test tube become pregnant success rate by spirit and turn over time.
" L Design to babies " R It is not a dream
Find DNA before the a pair of spiral structure on 1953 in Watson and Crick, scientist of British, scientist of American, some people hope that can have one day in the future " L Customize and design " R Baby - -He (she) Not having any hereditary disease innately, bring various excellent congenital conditions such as beautiful, intelligent, movement ability from the gene. In fact, this kind of idea disputes on the very great one at present " L Design to babies " R Embryonic form.
" L Design to babies " R As its name suggests, that was pointed is through interfering and bearing the course naturally manually, make the offspring that beeds accord with the need even more. With the progress of science and technology, especially first test tube baby Louis and # 8226 in 1978; Brown is after Britain was born, " L Design to babies " R Technological threshold no longer become problem. The birth of little Oliver is " L Design to babies " R Latest example. If researchers do not hybridize technology and remove the defective egg cell through the genome, that egg cell which is pregnant with little Oliver is very difficult to be selected out.
Besides screening the egg cell, the most popular at present one " L Design the means " R Science of heredity is diagnosed (PGD) before planting into Technology, it applies to test tube and is fertilized technology, can be before the embryo plants into the parent, the potential disease (mainly hereditary disease) that endangers exists to select 100 multi-type .
Violate the feudal order or take preventive measures?
Once there was a case: Cindy, John and # 8226; When the first child of Mr. and Mrs. Whateley is 9 months old, die from fatal hereditary disease - --Spinal skin atrophy . Science of heredity is analyzed and finds, Whateley's child will have 1 4 chances to get upper spinal amyotrophy in statistics. For take the risk of, let another child too no longer " L Win a bid " ,Mr. and Mrs. Whateley have used PGD technology, 3 children who were later was conceived were all very healthy.
Except screen, " L Design to babies " R Technology is still developing to most more advanced direction. There are scientist's imaginations, plant the embryonated egg into the parent, pass the genetic damage technology at the molecule level, have the cell body hereditary gene of danger to all reject. Similar technology has caused the enormous dispute, someone objects to saying, this kind " L Admit the best of the examinees " Technology ordinary without being deprived life is facing human world for right,can't last human natural propagation seriously. Someone is anxious even more, if " L Bad " R The gene is all removed, may break the equilibrium of the human hereditary system, bring the disaster to whole human race.
|