Jennifer Lopez is, indeed, pregnant! The baby bump she sported during her justsweet show during NY Fashion Week really said it all.

In Touch reports that Jennifer had an ultrasound performed in a New York office on September 12. "The test calculated that she was about 12 weeks pregnant," an insider says. "She's due in the spring."

Jennifer, 38, and singer hubby Marc Anthony, 39, have been trying to have a baby the last two years but finally had some luck in July with in vitro fertilization -- so successful, in fact, that there's a possibility she's having twins!

[JJ]