My wife and I have been in Kuala Lumpur for work for the past two weeks. She is pregnant. When we walk in the city, people seem to stare at her baby bump, sometimes rudely. Tonight, there was a Chinese woman who stared at her in an uncomfortable way. We notice though that it's not just Chinese women (although they are most likely to stare). Frequently their eyes immediately go to her belly like it's someone of interest. My question is why? Is there a cultural reason why a baby bump is so interesting?