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 For girls, puberty can start as early as age 7Â½ years or as late as age 13. 2  Their breasts begin to develop and their hips get wider. 3  Girls start to grow underarm hair and pubic hair, and have a growth spurt.4  They start having menstrual periods about 2 to 3 years after their breasts start to develop. For girls, puberty can start as early as age 7Â½ years or as late as age 13. 2  Their breasts begin to develop and their hips get wider. 3  Girls start to grow underarm hair and pubic hair, and have a growth spurt.