According to Singapore's "Lianhe Zaobao," reported the research work leading the Vienna University anthropologist Fidel noted that, while men choose women younger than he is to improve the reproductive opportunities, and women were selected because of security than older men to say their own , is not new, but it is the first study to show that do meet the needs of the family line, that is, to birth the most children.
The researchers said they registered to the Swedish government offices, the study of 11,500 from 1945 to 1955 men and women born between the information to understand what age they start from the parents. They do not replace those in the study who had partner data, we found that if the age difference between partners is between 4 to 6 years old, the family will be able to average fertility of 2.2 children; In contrast, the average reproductive age couples were only 2.1 a child.
The study also found that both male and female, as long as the replacement partner, their partner would certainly be the first of a second companion young. Fidel said that although the men will happen is predictable, but the situation of women is surprising. He said this may be because women are looking for a second mate has older, so will want to find a younger, stronger male fertility.
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