1 Sigmoid colon: The final S-shaped length of the colon, curves inward among the coils of your small intestine, then empties into the rectum.  Rectum: The final section of digestive tract measures from 1 to 1.6 inches (or 2.5 to 4 cm). Leftover waste collects there, expanding the rectum, until you go to the bathroom.
In addition to a missed period, the earliest signs and symptoms of pregnancy might include: 1  Tender, swollen breasts. 2  Nausea with or without vomiting. 3  Increased urination. 4  Fatigue. 5  Food aversions or cravings. 6  Next.
Pregnancy lasts about 40 weeks, and has three phases or stages; the 1st, 2nd, 3rd trimesters. Early symptoms of pregnancy may include constipation, headache, heartburn, extreme tiredness, and upset stomach. Symptoms vary from week to week during pregnancy. A pregnancy test can easily confirm if you are pregnant.