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9 MOS. PREGNANT
5 MOS. AFTER

GWEN STEFANI
Her trainer Mike Heatlie recommends clients do high-intensity resistance training four times a week.

8 MOS. PREGNANT
1 MONTH AFTER

NAOMI WATTS
"Nursing helps drop the immediate weight," says Watts, who also biked and walked while pregnant.

7 MOS. PREGNANT
5 WEEKS AFTER

REBECCA ROMIJN
She had pregnancy cravings for soy cream cheese and an appetite that left her "getting bigger by the day," husband Jerry O'Connell joked. But since the Dec. 28 arrival of twin girls Charlie and Dolly, she has been slimming down with Pilates classes and "walking around her ranch for exercise," says a friend.

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  • Marisa Laudadio.