A colon polyp is a small clump of cells that forms on the lining of the colon. Most colon polyps are harmless. But over time, some colon polyps can develop into colon cancer, which is often fatal when found in its later stages. Anyone can develop colon polyps. You're at higher risk if you're 50 or older, are overweight or a smoker, or have a personal or family history of colon polyps or colon cancer. Colon polyps often don't cause symptoms.
A pregnancy is divided into trimesters: 1  the first trimester is from week 1 to the end of week 12. 2  the second trimester is from week 13 to the end of week 26. 3  the third trimester is from week 27 to the end of the pregnancy.
Hereâs what you need to know about how many weeks, months and trimesters there are in a pregnancyâand where you fit in. There are 40 weeks (or 280 days) in a pregnancy, starting from the first day of your last menstrual period. Keep in mind, however, that only about 30 percent of pregnancies last 40 weeks.