In vitro fertilization

The protocols vary, but all harvested eggs are fertilized, then usually up
to 3 are re-implanted. The rest are frozen for subsequent attempts if
necessary.
Most hospitals will only go with three, which represents the best
statistical probability of at least 1 being successful, while not wishing to
complicate things with multiple births.
There is a rating system for fertilized eggs, and they implant the best
first.
"Paulo Jorge O. C. Matos" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Hi all,

I'd like to know if in In Vitro fertilization, only one
egg is used and only one spermatozoid or there are many
eggs and spermatozoids and the fertelization is done one
at least one egg is correctly fertilized?

Cheers,

--
Paulo J. Matos : pocm [_at_] mega . ist . utl . pt
Instituto Superior Tecnico - Lisbon Computer and Software
Eng. - A.I.
- > mega.ist.utl.pt~pocmOpen ↗
---
-> God had a deadline... So, he wrote it all in
Lisp!

Thanks for your clear and simple answer. Can you tell me
what happens to the frozen eggs when the fertilization is
successful? Are they thrown out as trash?

Cheers,

Paulo Matos

tech27 said:

The protocols vary, but all harvested eggs are fertilized,
then usually up to 3 are re-implanted. The rest are frozen
for subsequent attempts if necessary. Most hospitals will
only go with three, which represents the best statistical
probability of at least 1 being successful, while not
wishing to complicate things with multiple births. There
is a rating system for fertilized eggs, and they implant
the best first. "Paulo Jorge O. C. Matos"
<[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Hi all,

I'd like to know if in In Vitro fertilization, only one
egg is used and only one spermatozoid or there are many
eggs and spermatozoids and the fertelization is done one
at least one egg is correctly fertilized?

Cheers,

--
Paulo J. Matos : pocm [_at_] mega . ist . utl . pt
Instituto Superior Tecnico - Lisbon Computer and Software
Eng. - A.I.
- > mega.ist.utl.pt~pocmOpen ↗
---
-> God had a deadline... So, he wrote it all in
Lisp!

--
Paulo J. Matos : pocm [_at_] mega . ist . utl . pt Instituto
Superior Tecnico - Lisbon Computer and Software Eng. - A.I.
- > mega.ist.utl.pt~pocmOpen ↗
---
-> God had a deadline... So, he wrote it all in
Lisp!

Quoted message said:

That depends -- and is behind some of the controversy
regarding the use of leftover eggs for making stem cells.

Suggest: discuss it with your IVF clinic in advance. They
may have policies, which may be determined in part by your
laws. You may be able to declare your preferred answer to
that in advance, and that may not be a bad idea.

I do not have an IVF clinic since this information is for a
work on philosophy. Is there any reference online about
ethics on this special case, i.e. what can, cannot, should
and should not be done with this eggs?

Cheers,

Paulo Matos

Quoted message said:

bob

--
Paulo J. Matos : pocm [_at_] mega . ist . utl . pt Instituto
Superior Tecnico - Lisbon Computer and Software Eng. - A.I.
- > mega.ist.utl.pt~pocmOpen ↗
---
-> God had a deadline... So, he wrote it all in
Lisp!

[snip]

Quoted message said:

There are serious ethical and moral considerations about
what is done with them. Like there is no way they could be
sold to a woman who no longer ovulates.

Is there any reference you could point me to mentioning
these ethical and moral considerations? I'm doing a work on
these issues and any references would help me a lot.

Cheers,

--
Paulo J. Matos : pocm [_at_] mega . ist . utl . pt Instituto
Superior Tecnico - Lisbon Computer and Software Eng. - A.I.
- > mega.ist.utl.pt~pocmOpen ↗
---
-> God had a deadline... So, he wrote it all in
Lisp!

Could you please explain in somewhat more detail how
fertilization is done? Is the spermatozoid injected into the
egg? Or they stay in any liquid until they fertilize?

Cheers,

Paulo Matos

tech27 said:

The protocols vary, but all harvested eggs are fertilized,
then usually up to 3 are re-implanted. The rest are frozen
for subsequent attempts if necessary. Most hospitals will
only go with three, which represents the best statistical
probability of at least 1 being successful, while not
wishing to complicate things with multiple births. There
is a rating system for fertilized eggs, and they implant
the best first. "Paulo Jorge O. C. Matos"
<[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Hi all,

I'd like to know if in In Vitro fertilization, only one
egg is used and only one spermatozoid or there are many
eggs and spermatozoids and the fertelization is done one
at least one egg is correctly fertilized?

Cheers,

--
Paulo J. Matos : pocm [_at_] mega . ist . utl . pt
Instituto Superior Tecnico - Lisbon Computer and Software
Eng. - A.I.
- > mega.ist.utl.pt~pocmOpen ↗
---
-> God had a deadline... So, he wrote it all in
Lisp!

--
Paulo J. Matos : pocm [_at_] mega . ist . utl . pt Instituto
Superior Tecnico - Lisbon Computer and Software Eng. - A.I.
- > mega.ist.utl.pt~pocmOpen ↗
---
-> God had a deadline... So, he wrote it all in
Lisp!

On Tue, 08 Jun 2004 23:56:30 +0100, [email hidden] (Paulo Jorge

O. C. Matos) said:

Thanks for your clear and simple answer. Can you tell me
what happens to the frozen eggs when the fertilization is
successful? Are they thrown out as trash?

That depends -- and is behind some of the controversy
regarding the use of leftover eggs for making stem cells.

Suggest: discuss it with your IVF clinic in advance. They
may have policies, which may be determined in part by your
laws. You may be able to declare your preferred answer to
that in advance, and that may not be a bad idea.

bob

I think you are given the choice of having them destroyed or
kept. In any case, they belong to the donor couple. I'm not
sure how long they can be successfully stored for. We never
had any left over after 3 cycles
(harvest/fertilization/implant).

BTW-Most hospital in-vitro clinics will only let you do 3
cycles. I was told that this was not necessarily due to any
inherent risks, but that it screws up their success rate,
which is like the JD Power rating for these clinics. They
make huge money for the hospitals so they want to be able to
say they have a very high success rate.

"Paulo Jorge O. C. Matos" <[email hidden]> wrote in
message "]news:[email hidden]...

Quoted message said:

Thanks for your clear and simple answer. Can you tell me
what happens to the frozen eggs when the fertilization is
successful? Are they thrown out as trash?

Cheers,

Paulo Matos

tech27 said:

The protocols vary, but all harvested eggs are
fertilized, then usually

up

Quoted message said:

Quoted message said:

to 3 are re-implanted. The rest are frozen for
subsequent attempts if necessary. Most hospitals will
only go with three, which represents the best
statistical probability of at least 1 being successful,
while not

wishing to

Quoted message said:

Quoted message said:

complicate things with multiple births. There is a
rating system for fertilized eggs, and they implant the
best first. "Paulo Jorge O. C. Matos"
<[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Hi all,

I'd like to know if in In Vitro fertilization, only one
egg is used and only one spermatozoid or there are many
eggs and spermatozoids and the fertelization is done
one at least one egg is correctly fertilized?

Cheers,

--
Paulo J. Matos : pocm [_at_] mega . ist . utl . pt
Instituto Superior Tecnico - Lisbon Computer and
Software Eng. - A.I.
- > mega.ist.utl.pt~pocmOpen ↗
---
-> God had a deadline... So, he wrote it all in
Lisp!

--
Paulo J. Matos : pocm [_at_] mega . ist . utl . pt
Instituto Superior Tecnico - Lisbon Computer and Software
Eng. - A.I.
- > mega.ist.utl.pt~pocmOpen ↗
---
-> God had a deadline... So, he wrote it all in
Lisp!

On Thu, 10 Jun 2004 00:48:20 +0100, [email hidden] (Paulo Jorge

O. C. Matos) said:

Could you please explain in somewhat more detail how
fertilization is done? Is the spermatozoid injected into
the egg? Or they stay in any liquid until they fertilize?

Traditional procedure is the latter... mix liquid samples
containing sperm and eggs, and let them find each other.

Single sperm injection is a new procedure. It is
particularly useful when it is not possible to obtain a
standard sample of sperm. There is some controversy about
this procedure, but it is used and does work.

bob

"Bob" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

On Tue, 08 Jun 2004 23:56:30 +0100, [email hidden]
(Paulo Jorge

Quoted message said:

Suggest: discuss it with your IVF clinic in advance.
They may have

policies, which may be determined in part by your laws.
You may be able to declare your preferred answer to that
in advance, and that may not be a bad idea.

bob

Good idea in theory, but it's hard to say what you may
want to do with any leftovers before you know how it turns
out. In any case, I'm quite sure that the eggs are the
legal property of the donor couple and what is done with
them is entirely up to them. These are not surgical waste
like kidney stones or gall bladders. There are serious
ethical and moral considerations about what is done with
them. Like there is no way they could be sold to a woman
who no longer ovulates.

On Wed, 09 Jun 2004 18:52:00 +0100, [email hidden] (Paulo Jorge

O. C. Matos) said:

Quoted message said:

That depends -- and is behind some of the controversy
regarding the use of leftover eggs for making stem cells.

Suggest: discuss it with your IVF clinic in advance.
They may have policies, which may be determined in
part by your laws. You may be able to declare your
preferred answer to that in advance, and that may not
be a bad idea.

I do not have an IVF clinic since this information is for a
work on philosophy. Is there any reference online about
ethics on this special case, i.e. what can, cannot, should
and should not be done with this eggs?

probably, try google or scirus.

But... I would encourage you to contact a local clinic, or
such. The laws of your country and the clinic's regulations
matter. Further, a clinic should have useful educational
materials for their prospective clients. In fact, one of the
more interesting ethical questions may be how they help you
sort through the ethical questions.

Another poster is telling you how a clinic s/he knows works.
Any relevance of that to you is unknown.

An important type of issue deals with what happens if the
two donors are no longer together (either due to death or
separation). I know there have been legal fights in the US
about this. This is a good example of a type of issue that
is best resolved at the start.

A newer type of issue relates to the possible use of the
frozen cells for research, such as for making stem cells.

What concerns _you_?

bob