You are right that the incidence of Down's syndrome dramatically
increases after age 40, but the DNA is no longer very good. And there
is also a dramatically increased incidence of other chromosonal
abnormalities other than Down's.
After the age 42 the fertility rate begins to decline dramatically and
is extremely low after age 45 (of course there are some exceptions, a
natural conceived live birth occurred in a 57 year old). Fertility
charts generally stop at age 44.
The DNA in the older eggs just doesn't bind very well with the male
DNA (which also is not very good after 40 either and contributes to
the fertility problem, spontaneous abortion, and chromosonal
abnormality problem).
Most of the older women you see in the news media having children used
oocyte or embyro transfer techniques, not their own eggs.
On Sat, 12 Feb 2005 03:38:33 -0500, "Jim S" <[email hidden]>
Quoted message said:Women can get pregnant with their own eggs until their sixty - potentially.
Its just thats the risk of Down's etc. increases exponentially after the
age of forty. Its something like 1 in 75 at age 38 and 1 in 25 at age 44.
"Darrell Criswell" <[email hidden]> wrote in message
news:[email hidden]...
Quoted message said:No matrimonial inquiries, but Oprah did ask Lance if he wanted and
could have more children, Lance was non-commital initially, but after
some discussion admitted he still had some tadpoles left and after he
finished racing would like to have some more children, didn't say it
would be with Sheryl, she had a funny facial expression. I think her
eggs are getting to be a bit old. She is forty two and I don't think
women can get pregnant past 45 with their own eggs (maybe be a few
exceptions but its extremely rare).
Luke said:In article <[email hidden]>, psycholist
<[email hidden]> wrote:
> Lance and Sheryl are Oprah's guests on Friday.
>
> I'm sure Oprah will get to the bottom of all the doping buzz. Word is
> that
> Lance and Oprah will race. That'll probably look a lot like Lance and
> der
> Kaiser racing in February (excepting for color differences).
LOL. Revenge of the Master Fatties! Yes, we can all expect a
substantive, incisive interview from Oprah. Get ready for matrimonial
inquiries! Maybe Sheryl's new video--premiered on Oprah?--will feature
some Lance action.
I'd consider the appearance successful if LA could just relax before an
interviewer; sans bike, he always seems so ill at ease, so stilted
before the camera. Charismatic he's not.
luke