London, April 26 (Inditop.com) Actress-singer Jennifer Lopez, who is playing a pregnant woman in her upcoming film “The Back up Plan”, says pregnancy is like “an invasion of the body snatchers”.

“I wanted to put as much in as we could that was real – the overeating, the burping. Why not? It’s funny too. Pregnancy and giving birth are weird, strange. The growing life inside you, it’s like an invasion of the body snatchers,” contactmusic.com quoted Lopez, 40, as saying.

Lopez, mother of two-year-old twins, says she is learning about the differing attitudes of men and women by observing her children Max and Emme.

“I’ve figured out the difference between men and women by seeing their innate characteristics. She is very careful, and you can see her thinking; men don’t think, they attack and deal with the consequences. We approach life and love in different ways,” she added.

“The Backup Plan” also featuring Alex O’Loughlin will release in Europe in May.