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.
1 doctor agreed: It depends: Women may start to show the pregnancy at different times. It depends on the woman's body type, her usual abdomen size, and amount of body fat as well as how fast the baby is growing. It is also different when there are twins or more babies.