做试管胚胎冷冻可以冷冻多久?胚胎质量会下降吗?
定义:
人类胚胎的冷冻(human embryo cryopreservation)是指通过采用某种特殊的技术将试管患者的胚胎冷冻保存起来,以用于将来的胚胎植入;当胚胎在慢速冷冻或者玻璃化冷冻的条件下,被最终保存在液态氮中的过程,叫做冷冻胚胎;若经过解冻复苏后进行移植,则被称为冻胚移植(frozen embryo transfer)。
方法:
目前,用于人类胚胎冷冻的方法可分为两大类:慢速冷冻法(slow cooling)和快速冷冻法(rapid cooling)。
1.程序化慢速冷冻法:以冷冻保护剂处理后,在电脑控制的冷冻程序下,降温至-120°C,最后将胚胎放在-196°C的液态氮中长期保存。
2.玻璃化冷冻法:应用高浓度防冻剂,通过快速降温越过冰晶形成的阶段,不发生结晶即可固化,使溶液形成一种无规则结构的稳定玻璃样固体,且保持液态时正常的分子和离子分布,直接投入液态氮中保存。
保存时间:
直到目前为止,全球研究中,通过冷冻胚胎技术而活产的最长保存时间是25年,我们国家专家建议冻存胚胎尽可能在5年之内使用,拟再生育者,最长保存和临床使用期限不要超过10年。
结局及影响:
从科学角度分析,冷冻的胚胎在零下196℃的情况下,其代谢几乎完全处于静止状态,不会衰老所以存储时间长短对其发育潜能及健康状况没有显著影响。经过多年反复的临床研究结果验证,冷冻胚胎解冻后的损害很小。原则上来讲只要在胚胎复苏的过程中胚胎能够成功复苏移植到女性子宫内后能够正常着床,各项临床指标检测均正常,一般情况下出生的婴儿没有问题。 https://t.cn/RD4C3n3
定义:
人类胚胎的冷冻(human embryo cryopreservation)是指通过采用某种特殊的技术将试管患者的胚胎冷冻保存起来,以用于将来的胚胎植入;当胚胎在慢速冷冻或者玻璃化冷冻的条件下,被最终保存在液态氮中的过程,叫做冷冻胚胎;若经过解冻复苏后进行移植,则被称为冻胚移植(frozen embryo transfer)。
方法:
目前,用于人类胚胎冷冻的方法可分为两大类:慢速冷冻法(slow cooling)和快速冷冻法(rapid cooling)。
1.程序化慢速冷冻法:以冷冻保护剂处理后,在电脑控制的冷冻程序下,降温至-120°C,最后将胚胎放在-196°C的液态氮中长期保存。
2.玻璃化冷冻法:应用高浓度防冻剂,通过快速降温越过冰晶形成的阶段,不发生结晶即可固化,使溶液形成一种无规则结构的稳定玻璃样固体,且保持液态时正常的分子和离子分布,直接投入液态氮中保存。
保存时间:
直到目前为止,全球研究中,通过冷冻胚胎技术而活产的最长保存时间是25年,我们国家专家建议冻存胚胎尽可能在5年之内使用,拟再生育者,最长保存和临床使用期限不要超过10年。
结局及影响:
从科学角度分析,冷冻的胚胎在零下196℃的情况下,其代谢几乎完全处于静止状态,不会衰老所以存储时间长短对其发育潜能及健康状况没有显著影响。经过多年反复的临床研究结果验证,冷冻胚胎解冻后的损害很小。原则上来讲只要在胚胎复苏的过程中胚胎能够成功复苏移植到女性子宫内后能够正常着床,各项临床指标检测均正常,一般情况下出生的婴儿没有问题。 https://t.cn/RD4C3n3
纽约时间比加州时间早三个小时,
New York is 3 hours ahead of California,
但加州时间并没有变慢。
but it does not make California slow.
有人22岁就毕业了,
Someone graduated at the age of 22,
但等了五年才找到稳定的工作!
but waited 5 years before securing a good job!
有人25岁就当上CEO,
Someone became a CEO at 25,
却在50岁去世。
and died at 50.
也有人迟到50岁才当上CEO,
While another became a CEO at 50,
然后活到90岁。
and lived to 90 years.
有人单身,
Someone is still single,
同时也有人已婚。
while someone else got married.
奥巴马55岁就退休,
Obama retires at 55,
川普70岁才开始当总统。
but Trump starts at 70.
世上每个人本来就有自己的发展时区。
Absolutely everyone in this world works based on their Time Zone.
身边有些人看似走在你前面,
People around you might seem to go ahead of you,
也有人看似走在你后面。
some might seem to be behind you.
但其实每个人在自己的时区有自己的步程。
But everyone is running their own RACE, in their own TIME.
不用嫉妒或嘲笑他们。
Don’t envy them or mock them.
他们都在自己的时区里,你也是!
They are in their TIME ZONE, and you are in yours!
生命就是等待正确的行动时机。
Life is about waiting for the right moment to act.
所以,放轻松。
So, RELAX.
你没有落后。
You’re not LATE.
你没有领先。
You’re not EARLY.
在你自己的时区里,一切安排都准时。
You are very much ON TIME, and in your TIME ZONE.
New York is 3 hours ahead of California,
但加州时间并没有变慢。
but it does not make California slow.
有人22岁就毕业了,
Someone graduated at the age of 22,
但等了五年才找到稳定的工作!
but waited 5 years before securing a good job!
有人25岁就当上CEO,
Someone became a CEO at 25,
却在50岁去世。
and died at 50.
也有人迟到50岁才当上CEO,
While another became a CEO at 50,
然后活到90岁。
and lived to 90 years.
有人单身,
Someone is still single,
同时也有人已婚。
while someone else got married.
奥巴马55岁就退休,
Obama retires at 55,
川普70岁才开始当总统。
but Trump starts at 70.
世上每个人本来就有自己的发展时区。
Absolutely everyone in this world works based on their Time Zone.
身边有些人看似走在你前面,
People around you might seem to go ahead of you,
也有人看似走在你后面。
some might seem to be behind you.
但其实每个人在自己的时区有自己的步程。
But everyone is running their own RACE, in their own TIME.
不用嫉妒或嘲笑他们。
Don’t envy them or mock them.
他们都在自己的时区里,你也是!
They are in their TIME ZONE, and you are in yours!
生命就是等待正确的行动时机。
Life is about waiting for the right moment to act.
所以,放轻松。
So, RELAX.
你没有落后。
You’re not LATE.
你没有领先。
You’re not EARLY.
在你自己的时区里,一切安排都准时。
You are very much ON TIME, and in your TIME ZONE.
据说:最近在美国很火的一首小诗,有点意思,转发一下。
[心]走在自己的时区里
在时间上,纽约走在加州前面三个小时,
New York is 3 hours ahead of California,
但加州并没有变慢。
but it does not make California slow.
有人22岁就毕业了,
Someone graduated at the age of 22,
但等了五年才找到好工作!
but waited 5 years before securing a good job!
有人25岁就当上了CEO,
Someone became a CEO at 25,
却在50岁去世了。
and died at 50.
也有人直到50岁才当上CEO,
While another became a CEO at 50,
最后活到90岁。
and lived to 90 years. [鲜花]
有人依然单身,
Someone is still single,
而别人却早已结婚。
while someone else got married.
奥巴马55岁退任总统,
Obama retires at 55,
而川普却是70岁才开始当。
but Trump starts at 70.
世上每个人都有自己的发展时区。
Absolutely everyone in this world works based on their Time Zone.
身边有些人看似走在你前面,
People around you might seem to go ahead of you,
也有人看似走在你后面。
some might seem to be behind you.
但其实每个人在自己的时区有自己的步程。
But everyone is running their own RACE, in their own TIME.
不用嫉妒或嘲笑他们。
Don’t envy them or mock them.
他们都在自己的时区,你在你的!
They are in their TIME ZONE, and you are in yours!
生命就是等待正确的时机行动。
Life is about waiting for the right moment to act.
所以,放轻松。
So, RELAX.
你没有落后,
You’re not LATE.
你没有领先。
You’re not EARLY.
在命运为你安排的属于你自己的时区里,一切都非常准时。
You are very much ON TIME, and in your TIME ZONE Destiny set up for you.
[心]走在自己的时区里
在时间上,纽约走在加州前面三个小时,
New York is 3 hours ahead of California,
但加州并没有变慢。
but it does not make California slow.
有人22岁就毕业了,
Someone graduated at the age of 22,
但等了五年才找到好工作!
but waited 5 years before securing a good job!
有人25岁就当上了CEO,
Someone became a CEO at 25,
却在50岁去世了。
and died at 50.
也有人直到50岁才当上CEO,
While another became a CEO at 50,
最后活到90岁。
and lived to 90 years. [鲜花]
有人依然单身,
Someone is still single,
而别人却早已结婚。
while someone else got married.
奥巴马55岁退任总统,
Obama retires at 55,
而川普却是70岁才开始当。
but Trump starts at 70.
世上每个人都有自己的发展时区。
Absolutely everyone in this world works based on their Time Zone.
身边有些人看似走在你前面,
People around you might seem to go ahead of you,
也有人看似走在你后面。
some might seem to be behind you.
但其实每个人在自己的时区有自己的步程。
But everyone is running their own RACE, in their own TIME.
不用嫉妒或嘲笑他们。
Don’t envy them or mock them.
他们都在自己的时区,你在你的!
They are in their TIME ZONE, and you are in yours!
生命就是等待正确的时机行动。
Life is about waiting for the right moment to act.
所以,放轻松。
So, RELAX.
你没有落后,
You’re not LATE.
你没有领先。
You’re not EARLY.
在命运为你安排的属于你自己的时区里,一切都非常准时。
You are very much ON TIME, and in your TIME ZONE Destiny set up for you.
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