A new study has established an apparent link between birth control and a successful career graph of a woman.

The study, based on the data from the National Bureau of Economic Research, has shown that women, who opted for contraceptives at an early age to avoid pregnancy, earned eight percent more each year than their counterparts who didn't have access to pills at an early age.

The researchers of the University of Michigan carried out a survey on women aged between 14 to 24 years and found out that the impact of birth control was not only on the career graph and employment but on the salary and promotions as well.

The pill's availability likely altered norms and expectations about marriage and childbearing, Martha Bailey, the chief author of the study, told the Huffington Post. It also likely affected the decisions of companies to hire and promote women.

The findings explain that the women who had access to contraceptive at an early age were more likely to earn more than the ones who didn't have or started taking at an older age.

Presumably, the women who were able to avoid unwanted pregnancies at early age are able to complete their education and lead an untroubled life. They end up doing better in their career and consequently savored a pleasing monetary status in life.

As the pill provided younger women the expectation of greater control over childbearing, women invested more in their human capital and careers, Bailey said.

Most affected were women with some college, who benefited from these investments through remarkable wage gains over their lifetimes, she explained.

The study also revealed that the women who belonged to less privileged background benefited the most from early use of birth control pills, Daily Mail reported.