Model/actress Molly Sims was too ashamed to leave her house after gaining 72 pounds (32 kilograms) during her pregnancy.

The beauty welcomed her son, Brooks Alan, her first child with her movie producer husband Scott Stuber, last June (12), and she was subsequently horrified to discover she had gained a lot of weight while she was pregnant.

Sims admits she became a recluse during her first few months as a new mother because she didn't want to show off her curvy new figure.

She tells America's Entertainment Tonight, "I didn't step on a scale until I gave birth and I didn't realise I had gained 72 pounds so it was definitely a struggle. It was depressing and I didn't want to go out of the house. It was hard. It was definitely a difficult time."