1 Cecum: This first section of your large intestine looks like a pouch, about two inches long. It takes in digested liquid from the ileum and passes it on to the colon.  Colon: This is the major section of the large intestine; you may have heard people talk about the colon on its own.
Differences by Age. Older teens have much higher pregnancy rates than younger teens. In 2010, teens ages 18 to 19 had a pregnancy rate of 96.2, compared with rates of 30.1 among teens ages 15 to 17 years, and 1.1 among teens under age 15.[9] (Appendix 1).ifferences by Age. Older teens have much higher pregnancy rates than younger teens. In 2010, teens ages 18 to 19 had a pregnancy rate of 96.2, compared with rates of 30.1 among teens ages 15 to 17 years, and 1.1 among teens under age 15. [9] (Appendix 1).
Declines were greatest for women between the ages of 15 and 24 (falling by 22 percent for women 15 to 19, and by 10 percent for women 20 to 24). (Appendix 1) Birth rates for women over 45, and for those under 15, were below one birth per 1,000 in 2013.(Figure 2).ge-specific birth rates are defined as the total number of births per 1,000 women in a specific age group (between ages 15 and 44). 2 Data for estimates before 1980 are based on the race/ethnicity of the child, from 1980 on estimates are based on the race/ethnicity of the mother.