The reason is that during the first three months of pregnancy certain pregnancy hormones work to prepare the body for bearing a child . The body needs some time to get adjusted with this . Some women find certain smells provoke vomitting while some others feel increase in their power to sense some particular smells . This does not happen to all . Also some women feel it because they know about this and feel that this happens to everyone during pregnancy .

Answered by Sulochana , an ibibo Master, at 6:02 PM on November 15, 2007

The reason could be that the sense of smell is heightened during pregnancy. It could have a psychological reason also because a lot of hormonal emotional changes take place in the female during pregnancy in many cases foods that they loved before conception they hated even the smell of it during pregnancy whereas some smells that bothered them before they seemed to love during this period. The studies are still going on and no concrete conclusion has been arrived upon though there are many hypothesis on this subject.

Answered by spice606 , an ibibo Advisor, at 6:43 PM on November 14, 2007