If you would like to start trying for a baby soon, you may as well pick a paint color for the room now. That's because it's entirely possible for mothers to have some influence on the gender of their child by following either a high-calorie or calorie-restricted diet, say U.K. researchers.

In a joint study conducted at the University of Exeter and Oxford University, it was discovered that when women eat a diet rich in calories (including a regular breakfast) around the time of conception, they might be increasing the liklihood that they will give birth to a boy. Conversely, by restricting their caloric intake at this time, women may be improving their chances of giving birth to a girl.

It is known from IVF research that high levels of glucose encourages the growth and development of male embryos while inhibiting female embryos, just as low levels of glucose might encourage the opposite. However, researchers caution against restricting calories for the purpose of increasing your chances of having a girl. As one a fertility expert from the University of Sheffield stated in a recent BBC News interview, "It has been observed in some animal studies that even small changes in female diet can affect the life long health of the offspring, so it is important that the mother has appropriate nutrition at the time of conception and throughout her pregnancy."