You're ecstatic, you're weepy, you're nauseous, you're sleepy. Welcome to the wild world of pregnancy! You have, indeed, entered an entirely new realm: that of incubator, of progenitor, of mother. Your mind is reeling with the newness of it all, and questions abound: What can you do to "build" a healthy baby? Is it normal to have all these different feelings? And what does your little guy look like growing in there? Click below for a trimester-by-trimester, week-by-week guide to the entire nine months.