When you are pregnant, you have two hearts (one for yourself and one for the baby in your belly), so your body's metabolism doubles, so you won't get fat.

Chen Yihan's slimming fallacy (not necessarily scientific! Believe me, she only gained 4 kilograms when she was pregnant. She said it was because her two hearts had higher metabolism. In fact, it is probably because she loves sports very much that she has developed a constitution that is easy to lose weight. Which boyfriend do you like today?