Penn Badgley reacts to expecting twins with his wife Domino Kirke, joking "who could be" ready? The 'You' star shares son James, 4, with Kirke, and is stepdad to his wife's son Cassius.

A study from the NIH reveals that twins have smaller thigh volumes, less fat, and less muscle mass than singletons starting at 15 weeks of pregnancy. The findings challenge previous beliefs and could ...

Mackenzie McKee's twin pregnancy is moving along; there have been some emotional moments, like sharing the news at her mother's grave.