Luckily, women can take steps to boost their nest eggs.
First, in terms of tax-deferred savings, it's a great idea to take advantage of an employer-sponsored retirement plan like a 401(k). Catherine Collinson, president of the Transamerica Center for Retirement Studies, recommends contributing at least enough to receive the maximum employer match.
They can also contribute to a Roth IRA, and depending on income, that contribution may be tax deductible.
Read MoreRetirement savings fears grip Americans
Another opportunity to consider is the savers credit, which enables people below certain income thresholds ($61,000 for married couples filing jointly, $30,500 for single filers) to offset some of their retirement plan contributions.
Second, women can boost their financial knowledge and their confidence in making financial decisions. Investment firms hold regular seminars on retirement-related issues, and nonprofit organizations such as AARP or WISER provide information as well.
Hounsell advises seeking out financial experts who can help.
"If you have access to some kind of a planner or you can even get help in your community, that's a start," she said.
Collinson suggests looking into continuing education classes on money and saving at local community colleges and universities. There's also power in women learning about retirement saving together, she said.
"We need to find a way to cut through the noise and make it a topic among women. Men are more likely to discuss saving and planning for retirement than women are," she said.
Still, Collinson is hopeful that women will soon conquer the retirement challenges they face.
"In the years I've been doing this, people over time have become much more engaged in the topic," she said. "Women still lag behind men, however as a woman, I know that once we put our mind to something, we make things happen."