News DetailBack

How DNA might affect our reproductive choices

Women are increasingly choosing to have a child later in life. In the 1970s, the average age at which women decided to have their first child was 24, whereas in 2012, it was 29.

An increasing number of women also choose not to have any children at all. In the mid-1970s, 10 percent of American women aged 40-44 had never had a biological child. By 2005, this had surged to 20 percent, decreasing to 15 percent in 2015.

In industrialized countries, both parents are choosing to have children later in life, which affects the number of children they can have and their reproductive ability.

Both women's and men's age are important factors in the ability to conceive. By the age of 40, a woman's chances of conceiving have decreased by 50 percent.

Men's fertility starts to decrease significantly after the age of 40, and the risk of miscarriage is twice as high for women whose male partner is aged over 45 than for those with partners in their 20s.

As an increasing number of people are putting off having children, researchers have looked at the cultural and socioeconomic factors that may be responsible for these choices.

However, until now, there was no significant research on the genetic or biological factors that might influence this trend. A new study aims to fill this gap by looking at how DNA might influence our reproductive behavior.