Special Report: Pregnancy predictor

We're busier than ever and for many women that means hitting the snooze button on their biological clock to put things like work and education first.

But now, a new test could help you decide just how long you should let the clock keep ticking.

Eric Weber says, "We just want to enjoy being married and just being together for a couple years."

Like many young couples Robin and Eric Weber have decided to wait a little bit longer to start their family. But they're both 32-years-old, and they feel some pressure.

Robin says, "Our friends have all started to have children and some are having their second and third child now. "

Now the Plan Ahead test could give them a glimpse into the future of Robin's fertility. The makers of the test claim it can estimate the number of eggs a woman has.

Professor Bill Ledger says, "The idea behind the test was to give people a better idea on how their own bodies are behaving, how their ovaries are aging, hopefully when they're still young enough to do something about it "

And the test isn't just for first time moms. Women like Georgina Wickenden of London are using it to plan for their second or third child.

Georgina says, "I would like another child in about two years time or say. We're just enjoying Jay very much at the moment. I've done the test and the results are very good and we know I'm good for at least another two years."

But some experts warn that because the test doesn't tell a woman anything about the quality of her eggs, it shouldn't be taken as a guarantee on whether or not she will be able to conceive.

Dr. Thomas Toth of Massachusetts General Hospital says, "It's just too precious of a life circumstance to leave to a test that is done at the pharmacy or a test that is done at home."

Right now, the Plan Ahead test is only available in Great Britain, and costs around $300. The test could be available here in the U.S. later this year.

Robin and Eric say they hope to take the test soon.

Eric says, "We're gonna wait. But, depending on the results, it may have an influence on whether we choose to wait three years, or two years."

To take the Plan Ahead test, a woman sends a small blood sample of her blood to a lab, and the results are mailed back in two to three weeks.

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