Paris Wallace is one of those serial entrepreneurs with ambition that transcends wealth creation. Wallace is focused on changing people’s lives in a dramatic fashion. Ovuline, his latest venture for example, is a company aimed at helping women conceive through the use of a “fertility app” that monitors and tracks their monthly cycle and suggests the optimum time for baby-making. Its pregnancy app guides women to healthier pregnancies. In its two years of existence, this Boston-based health technology startup has helped more than 1.3 million women to conceive and have healthier pregnancies. By measuring self-reported health data regarding everything from diet to details of the menstrual cycle, the app guides a women through the fertility progression and helps many women conceive far more quickly. According to Wallace, the average woman tries for six months to get pregnant but using Ovuline, women are conceiving within 60 days.

An early stage startup, Ovuline has raised more than $3 million in seed investment and is already getting significant revenue traction. And it tracks well with Wallace’s previous startup venture, Good Start Genetics, which he founded with his HBS classmate Eric Boutin in 2008 in his last year at HBS. Good Start Genetics is now a successful late stage venture with more than 150 employees. The company offers a fertility diagnostic that allows parents to determine if their children are at risk of being born with a recessive genetic disorder. Good Start raised more than $28 million for Good Start from a series of investors including Orbimed Advisors and Safeguard Scientific.

Wallace believes he has found a sweet spot for his startup. According to TechCrunch, women’s health apps raised more than $102 million in venture funding between 2013 and 2014, more than all other health-focused apps combined. According to a profile of Wallace in Boston magazine, Ovuline’s team, using government pregnancy statistics, estimates that “at any given time, roughly two to three million women in America are trying to conceive. Today, about half of them are doing so with the help of a mobile app, and that number is growing.”

By amassing hundreds of millions of data points from more than a million women entering data into Ovuline’s pregnancy and fertility apps, Ovuline is seeking to not only build a profitable business model but also create a vast database of invaluable conception information. Ovuline collects a wide variety of information from health and wellness data points including menstrual cycle, cervical fluid, basal body temperature, nutrition, weight, sleep activity and more. Wallace calls this “the baby cloud” and says that it allows the Ovuline app to recommend the best time for women to have intercourse to conceive.

Wallace told Boston magazine that the company “may discover patterns and glean insights that would have been impossible for healthcare professionals to discern.” The hope is to discover better ways to understand pregnancy and maternal health and create an ability to predict significant outcomes such as birth defects and autism.

In an interview with HIStalk.com, Wallace said, “Research shows that 40 percent of fertility treatments are not needed because these women are sub-fertile not infertile. Conceiving is often an issue of timing, as 30 percent of women have irregular cycles. One of the big public issues around infertility is that it is almost taboo to talk about it. In general, I think any insights related to this space should be shared. We need to talk more about the tools and resources to help women conceive more quickly that don’t cost thousands of dollars.”

Wallace, who has worked for Goldman Sachs and A.T.Kearney, has spent the bulk of his career as an entrepreneur. A graduate of Amherst College, Wallace has served as co-president of the HBS Alumni Angels of Boston and New England.

What are the toughest challenges you are facing?

We’ve done a great job of establishing ourselves. We’ve navigated the very early stages of the company formation process, getting the company off the ground incredibly well. But now we’re at a point where from that very early stage where we are all startup generalists to becoming a revenue-generating company that is filled with a lot of specialists. So it’s a really challenging time.

So you find yourself hiring a different type of employee?

We’re now thinking what are our needs in-house and what type of people are we hiring? Why are they coming and what is their motivation. People are now joining us because they want a job, not necessarily because they want to work at a startup. It’s a transition; getting all the folks who joined because they did want to be in a startup and having them meld with the folks joining now who are real specialists in what they do. It’s a challenge that most startups go through. We’re now up to 18 people and we’re writing job descriptions for the first time. Before, it was hire really smart people who can figure it out. Now we need specialists.

How does this impact the culture?

We’re still small enough that people are very close. As we transition, we have to think: how do we maintain the culture we built? And as we hire specialists, how do we find people who fit into the culture?

Where do you expect Ovuline to be in five years?

Five years is a long time in the startup world. I can maybe give you five weeks. We’re just trying to build a valuable company when for us means helping a lot of people. We started out in fertility. We’ve now built a pregnancy product and we’ll be launching a mom and baby product soon. Ultimately, we want to help every woman in the U.S. to conceive naturally, have a healthy pregnancy and help them through the post-partum period and help their baby grow. We want to be the platform that millions of women are checking in with everyday to answer their most pressing questions during this very special time in their lives. The more people we help, the more valuable the company becomes. At this point, we have a pregnancy reported every 60 seconds.

When did you first realize you wanted to be an entrepreneur?

I grew up outside San Francisco and had a pretty humble background with a single mom who is disabled. I got my first job at a bike shop when I was 14 and worked 30 hours a week for minimum wage. In high school, I started my first company selling bicycles and accessories online. It was 1998 and the Internet was not incredibly competitive. We got into the space early and I remember I came home from school one day and checked my email and we had made more money that day while I was at school than I would make working 30 hours a week for a month at the bike shop. That’s when I knew I wanted to be an entrepreneur.