Tips for women entrepreneurs to boost revenue past $50,000

Half of U.S. workers are women and there are about 10.1 million businesses owned by females, according to the Shriver Report. Those companies employ about 23 million people and earn a combined revenue of $3 trillion.

But only 3% of businesses owned by women in the U.S. actually have revenue of $1 million, compared with 6% to 7% of companies owned by men, according to the Center for Women's Business Research.

In fact, 75% of all women-owned businesses in the U.S. have annual revenue of $50,000 or less.

Nell Merlino, president of Count Me In for Women's Economic Independence and creator of "Take Our Daughters to Work Day," said in an interview that there are several reasons many women-owned companies struggle to break past the $50,000 level.