The singer-and-actress, who married singer-songwriter Marc Anthony in June 2004, insists the time has come to settle down.
When asked by the New York Post newspaper if she was ready to be a mother, she said "yes" and patted her stomach.
She added: "When I got married a few years ago, I decided that I was going to pull back from all the craziness.
"What that provided me with was time to think about what was important to me. And as an artist, it's about having space, having time to let things happen inside of you."
Marc is J.Lo's third husband. She was married to restaurant manager Ojani Noa and dancer Chris Judd. She also dated rap mogul Diddy for two-and-a-half years and was engaged to Ben Affleck.
Read More- NeonSter