ocr: SEXUAL ORGANS URING THE COURSE of a pregnlancy a woman's body undergoes a number of physical changes, which can have important consequences. Pregnant women often feel tired and sensitive, and high levels ofsexual tension can make some women feel irritable. BREASTS In the first three months of pregnancy, tissue and glandular alterations mean that the breasts swell by as much as 25 percent and that the nipples enlarge. Some women find that their breasts feel sore, but tenderness lessens as the pregnancy advances. By the time the baby is born the breasts will have grown by almost a third of their ...