Ecology, Evolution and Genetics. Solutions to many of the world's most pressing environmental issues require a basic understanding of nature at the organismal, population and ecosystems level.
Average. On average, women start to show around the fourth month of pregnancy, between weeks 14 and 17. By week 17 the uterus usually has expanded to just an inch and a half below the navel, making the pregnancy more obvious.
As with other symptoms of pregnancy, the time and month when you start to show your baby bump will differ for every woman. Some women will not start to show till they are way into their second trimester while some may start showing as early as the end of their first trimester itself.