It's National Fertility Awareness Week and what better excuse for an avalanche of new research into women's ovaries?

The first comes courtesy of New York University, which has pointed the finger at the unrealistic portrayals of motherhood in celebrity magazines. The proliferation of women, they say, shown having babies aged over 40 is 'unrealistic' when the reality - according to the UK fertility regulator -is that women's chances of giving birth after a cycle of IVF are 33 per cent when she is under 35, and five per cent by the time she reaches 43.

Academics found that more than half the famous women whose pregnancies or births were mentioned in magazines Cosmopolitan, People and US Weekly were over 35 - something they say can be damaging to women because it encourages them to believe they can defer motherhood.

Other advice comes from Missouri's Washington University, which has found that a glass of red wine a week boosts a woman's fertility - seemingly going against the accepted thinking that women trying to conceive steer clear of alcohol altogether.

It's just the latest in a long line of confusing, conflicting - and often downright crazy - fertility 'advice' for women., much of which revolves around when we should conceive.

In 2015, researchers from the Centre for Human Reproduction in New York found that freezing women's eggs can damage their chances of having a successful birth later on. But, just a few months earlier, a study from Spain said women needed to freeze their eggs by 35. While a piece of research by the Julius Centre at University Medical Center Utrecht in the Netherlands said that women who want at least three children should should start trying for a baby by the age of 23.