Today's women are twice as likely as their mothers were, to become pregnant in their late 30s or 40s and the proportion of older moms has doubled in two decades.
Social researchers have blamed the mid-life "baby-bump" on job insecurity, health problems and a shortage of men who feel ready for fatherhood, News.com.au reported.
According to the latest Australian Bureau of Statistics data, based on births in 2011, shows that the proportion of new mothers aged 35 or older has doubled in two decades. In 2011, almost 25 percent women were 35 or older.
But in 1993, just 12 percent of new moms were 35-plus, the data revealed.
Only 18 percent of today's babies are born to mothers, who are younger than 25, compared to 25 percent 20 years ago.
Nearly 20 percent of babies in 2011 were born to a mother in her 30s.
About 4.2 percent babies were born to 40-something mothers, and women in their 50s had 53 babies.
Monash University researcher Dr Sara Holton said that her team's study of more than 500 Australian women found that money was not the main reason for postponing parenthood but was that their partner was just not interested in having children.
She also said that women also wanted to secure a flexible but not necessarily highly-paid job before they had a baby. (ANI)