Amanda Seyfried is turning 30 and panicking about the thing almost every woman in the situation panics about too.

She’s only 29, but she thinks the clock’s a’ tickin’.

“I keep feeling like my eggs are dying off,” Seyfried overshared with UK Marie Claire.

“Once you’ve turned 30, you might only have a 20 per cent [chance] of getting pregnant [each cycle],” she said.

“And that’s if everything is working well. Isn’t that crazy?”

It certainly IS crazy, Amanda Seyfried.

The actress has clearly fallen victim to the periodic scare-mongering that sees a flurry of articles entitled things like The dangers of delaying motherhood until 30  and  Pregnancy after 30 – dangerous for women and babies doing the rounds that cause young fertile women to lament their lost baby-making years.

They were too busy building careers and having lives and finding appropriate life-partners that they missed their prime breeding years. Damn feminism!

The truth is that the study Seyfried’s likely basing her fears on is woefully outdated. By about a few hundred years.

“The widely cited statistic that one in three women ages 35 to 39 will not be pregnant after a year of trying, for instance, is based on an article published in 2004 in the journal Human Reproduction. Rarely mentioned is the source of the data: French birth records from 1670 to 1830. The chance of remaining childless—30 percent—was also calculated based on historical populations,” writes Jean Twenge in The Atlantic.

“In other words, millions of women are being told when to get pregnant based on statistics from a time before electricity, antibiotics, or fertility treatment.”

Seyfried is turning 30 in December, and is dating professional cute guy Justin Long, 37.

“I need to get on it… I want a child, badly,” she told Marie Claire.

“I’ve been feeling like it for like, two years. I’m not ready, but nobody is ready.”

The good news for Seyfried, and all women who are 30 or over, single and imagining their futures alone with only cats for company, is that there are a few more up-to-date studies that show becoming pregnant in your 30s is not the magical biological feat some would have you believe.

One, published in Obstetrics & Gynecology in 2004, found that for women aged between 35 and 39 having sex two or more times a week, the chance of pregnancy within a year is 82 per cent.

Amanda Seyfried already has a baby – her adorable Australian shepherd, Finn, whom she adopted from a shelter. Post continues after gallery.

It also noted that the fertility of women in their late 20s and their early 30s is basically identical.

So chill Amanda. Stop worrying about your future childlessness and scaring the hell out of Justin Long.

Are you in your 20s or 30s and worried about fertility?

More articles on fertility?

Could you identify the age when fertility starts to decline?

MIA: For every woman struggling with infertility who feels like a failure right now.

Fertility. And why everything you thought you knew is wrong.