Chances of viable pregnancy at 42

It is ten times harder for a woman to become pregnant at 43 than at 37, doctors have warned.The rapid speeding up of a woman’s biological clock means that by the time she is 43, she will need to go through 44 eggs on average to produce just one normal embryo.
Researcher Meredith Brower said that the number of eggs needed for a viable pregnancy rises ‘almost exponentially’ after 42, and urged women to freeze their eggs without delay.British experts said that while, ideally, women would have their babies in their twenties, the realities of modern life mean many have no choice but to wait.
No delay: Experts say that women who want to freeze their eggs should do so in their late twenties or early thirties to have the best chance of success later.
Aging: Women aged 40 to 42 typically has a low chance of becoming pregnant with IVF and is unlikely to conceive naturally. Others believe women will be unwilling to pay the extra cost.The US scientists claim their procedure is the most advanced of several being developed to boost pregnancy odds, and is the only one to have been through rigorous trials that have all shown the same high success rates. The wrong chromosome count reduces the odds of pregnancy – or ‘implantation’ – and raises the risk of miscarriage. Only if the cells have 46 chromosomes is the embryo frozen.Some women will not have good enough embryos and will never become pregnant no matter how many times they have IVF.

So she has the same chances of implantation – at 60 per cent – as a woman who is 32.’Oxford academic Dr Dagan Wells, who helped develop the process, said freezing the embryo, known as cryopreservation, not only boosted the chances of pregnancy but produced healthier babies. You also have age on your side -- the average woman's fertility peaks at the age of 24.Women under age 25 have a 96 percent chance of conceiving in a year if they're trying each month. Most are easily treatable and don't require help from a specialist unless conception is taking longer than one year.Mid-late 20s (25 to 29)From age 25 to 34, you have an 86 percent chance of conceiving after trying for a year.
Your chances of miscarrying are 10 percent, only a little higher than they were in your early 20s. The only major change is that your chances of miscarriage by age 30 have risen to 20 percent.Conventional wisdom says that you don't need to see fertility treatment in your early 30s until you've been trying for a year with no luck, but some doctors recommend consulting your ob-gyn or primary care physician if you're still having trouble after 9 months.
That could mean a 78 percent chance of conceiving within the year.But 35 seems to be the point where fertility does decline. You're also at a little greater risk of miscarriage, a Down syndrome pregnancy or an abnormal pregnancy."Roughly 30 percent of women age 35 may take a year or more to conceive.

Intrauterine insemination is a less invasive assisted reproductive technology that may work but in vitro fertilization (IVF) may be an excellent treatment option as well.Finally, this is your last chance to freeze viable eggs for use at a later date, should you prefer not to get pregnant right now. At this stage, you're facing a few challenges that make it harder to conceive and to stay pregnant.
If a 42-year-old woman has five embryos placed, there is a 10 to 20 percent chance of pregnancy.
Success rates are 0 to 1 percent, and most clinics recommend using eggs donated by a younger woman for those who want to conceive between ages 46 and 50.For a woman in her mid-40s who wants to have a biological pregnancy, using a donor egg is best bet.

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