Michie Miller is expecting her first baby.
The 35–year–old Marketing Director says she put off having children to finish her education and get her career established.
"I thought I would be a better mother if I had all my ducks in a row," she says.
She says a conversation with her doctor two years ago encouraged her to focus on starting a family.
"I made the decision relatively quickly based on what he told me."
Now, more doctors are bringing up the delicate subject of fertility with women in their 30s.. letting them know that time won't always be on their side.
"There is no question that fertility decreases with age," says Dr. Adam Romoff with Lenox Hill Hospital. "I think it's kind of gradual between 35 and 38 and it starts to go down rapidly between 38 and 40."
It's estimated one in five women wait until they are 35 or older to have their first baby.
Doctors are also making women aware that the risks for genetic problems increase with age, so do pregnancy complications.
More doctors are also counseling patients in their 30s about options such as egg freezing, if they are still choosing to wait to start a family.
"You pick up a little risk in your late 30s about high blood pressure and diabetes," says Dr. Romoff.
Michie got pregnant after just a few months of trying and she's had no problems during this pregnancy.
"It was all about making the decision at the right time for me and for my husband," she says. "We were really, really lucky."
And she says based on the odds, they won't wait more than two years to try for another child.