Jamie-Lynn Sigler is opening up about how her multiple sclerosis (MS) battle played a role in her decision not to have a third baby with husband Cutter Dykstra. Sigler, 44, answered a fan's question about what it's like to be pregnant with MS during the Tuesday, December 30, episode of her and Christina Applegate's "MeSsy" podcast. "I can tell you, having been a mom of young kids [while having] MS, I see your pain and your struggle. It is very difficult," she told the listener. "Setting boundaries, asking for help, getting support, advocating for yourself, these things take time.