More cheerful woman boy

Behavioral Sciences, University of Auckland, New Zealand, an expert on bovine Grant recent study pointed out that the testosterone levels of female animals to determine whether the egg to accept the "male" sperm. Mammalian egg testosterone within the higher the higher the chance of male birth. Grant said: "This outer layer of the egg has long been designed, and X or Y chromosome with."

1991 to 1995, the Bosnia war, the local trend of increase in the number of new born baby. Grant explains this is due to the war period, women have to face difficulties, increased testosterone in their bodies with the rules.

In addition, numerous studies have indicated that a boy or girl depending on the mother's living environment and health. Balloon tour operators British Red holiday company boss Yi Lange, 41, is an example, she gave birth to four boys, normally very busy, but it has a strong character. Dominate others, another well-known football star's mother is Victoria Beckham's wife, she gave birth to three sons, childless women.

The other gave birth to baby "theory"

1. Accident, said: half and half chance of a boy or girl.

2. Strong men and women prone to say: Grant earlier research indicates that fathers engaged in more masculine, such as police, soldiers and butchers, the higher probability of a girl.

3. Researchers prone to Aberdeen, said: London School of Economics, a research study, engineers, actuaries and other with "systematic" boy opportunities for male head high.

4. Diet and season, said: Women who eat more cheese and other calcium-rich foods, a higher chance of a girl, but if you eat more alkaline food and red meat, high chance boy. There is also said that more than a girl pregnant in spring, and fall pregnant are more male students.