Colon cleansing, as well as increased fibre intake and healthy food choices, improves regularity and helps keep your weight under control. Fat is estrogen-based, and if too much is present, becoming pregnant becomes more difficult. A colon that is weighed down by years of build up can also press on the uterus and surrounding reproductive organs in women, causing strain. Colon cleansing rids the body of many chemicals and toxins that affect the egg and sperm. Many naturopaths recommend that both partners undergo colon cleansing before attempting pregnancy.