J.Lo To A-Rod: It's Baby Time!

Former “Fly Girl” Jennifer Lopez is swinging for a trip to the maternity ward at 47 with her baseball beau Alex Rodriguez, RadarOnline.com has exclusively learned.

“J.Lo’s so in love with A-Rod that she’s committed to having a baby with him!” said a source close to the former American Idol judge. “She knows there’s a risk, but she’s willing to take it with him!”

The high-profile couple has been snuggling up a storm since the former New York Yankees superstar — whose rep has been tarnished by steroid abuse and an extramarital affair with Madonna — benched his latest squeeze, Silicon Valley CEO Anne Wojcicki, in February.

“Alex is one of the few guys in the world that can make Jenny feel starstruck,” spilled an insider. “She’s a huge Yankees fan! She’s from the Bronx, after all — and she considers him a legend!”

“Jenny from the Block” introduced the former All-Star, 41, to her 9-year-old twins, Max and Emme, “shortly after they started dating,” one insider told RadarOnline.com. Alex even got a thumbs-up from their father, her ex-husband Marc Anthony, too.

“Marc is thrilled to see Jen with a true family man,” a source dished. “He was always worried about the younger guys she dated, like Drake and Casper Smart.”

Now the three-times-divorced Latin bombshell is telling everyone in her inner circle she’s ready to add to their bench — if A-Rod is the coach, and plays only for HER team.

“Jenny knows Alex hasn’t been a great husband or faithful boyfriend in the past,” the snitch revealed. “She’s given him a few months to prove he’s committed to her, and even put a private eye on him to make sure he passed the test. He has … so far.”