MD Moms - Word of mouth advertising.

New York Times

When MD Moms was introduced to market baby skin-care products a year ago, it had plenty going for it. The founders are pediatricians who are also mothers. The company has a strong distribution strategy and the baby products are cleverly packaged. But there was one thing lacking, a marketing budget.

“For us, it started unintentionally. The doctors got a few of their patients and friends involved in the creation. Knowing that they were part of it, they couldn’t wait to spread the word,” said Daina Nadler, the company’s director for marketing and sales. “By the time we launched we had a built-in client base. We hit our Year 1 distribution goal by the end of the first month.”