50 Cent has been involved in a few battles in his day (mostly initiated by him, of course). But the G-Unit star is enduring his toughest battle yet, with the mother of his child.

Fif told MTV News he hasn't been able to seen his son, Marquis, 11, because of the ongoing child custody case between him and Shaniqua Tompkins.

The two have been battling in court for some time now, over their son, and a mansion 50 owns that Tompkins lived in before it was burned down in May.

The brawny rapper is defiant regarding the case, but also dismayed over not being able to see his son.

"I'm not going through a custody battle; just a transition," he told MTV News. "I'd like to be able to just see my baby.

"In the summertime, for the first two years I was successful, my son has traveled with us on those tours," Fif added. "He was on the Rock the Mic Tour, he was on the Anger Management Tour. This summer, when he's free, it's, like, no communication. It's tough."

50 is faced with a restraining order that Tompkins took out on him. The stipulations require the rapper to stay away from Tompkins when she is out in public, to forfeit any firearms he may have, and Fif only can pick up his son from a curb-side distance.

"My relationship with my son is changing because he and his mom aren't friends anymore," 50 said. "There's different channels I have to go through. He has lawyers appointed to him through the court. So I have to talk to his lawyer to get things situated for me to actually get him."

The next court date between 50 and Tompkins in their child custody dispute has not been set yet.---Jayson Rodriguez