There's nothing Sarah Troia wanted more in life than this.

She says, "I wanted to be a mom for so long and so, at first, when we struggled, it was definitely heartbreaking that - Why isn't this happening? Why is it working for everybody else and why is it not working for us?"

A visit to Dr. Maud Doherty's office revealed why. Sarah had Endometriosis - a common fertility problem for women.

Infertility is more common than you may think. One in six couples in their 30s and one in four in the 40s have trouble getting pregnant.

Dr. Doherty says a few routine checks can determine the cause of fertility and treatment possibilities ranging from medication to in vitro fertilization. The process can be a challenge mentally and physically.

Dr. Doherty says, "We ask them to make changes in their lifestyle. In many cases we get patients who are very active. They exercise a lot. They watch what they eat and that isn't necessarily a good thing when it comes to fertility."

Sarah Troia told us, "Months after it wouldn't work, it was definitely devastating - a little disheartening. But I gave myself one day to be sad during that day that I got a negative test. I'd be like, 'OK, I'm sad today. Tomorrow is a new day.'"

Sarah says staying positive and focused on the end result is important. Her little Louie is proof .

Sarah says, "There's a lot of days I'll still cry that I'll be like I can't believe you're here. I can't believe your mine."

And she wants other women to know they could have their dreams of being a mom come true too.