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.
18. 249. I started showing for myself by about 11 or 12 weeks for my first, but I didn't actually show to anyone other than DH and I till I was 20 weeks. For my second pregnancy I started to show at about 12 weeks and had to try to hide it from work for a little longer.