Final answer:
Round ligament pain is associated with pregnancy, caused by stretching of the round ligaments supporting the uterus, leading to pain in the lower abdomen or groin, often upon movement.
Step-by-step explanation:
Round ligament pain is a common discomfort during pregnancy, primarily in the second trimester. It is caused by the stretching of the round ligaments, which are cord-like structures that run from the uterus to the groin. These ligaments support the uterus and must stretch to accommodate the growing uterus during pregnancy, which can cause sharp pain or a dull ache in the lower abdomen or groin area. The characteristics of round ligament pain include a sudden onset, often triggered by movement such as rising from a seated position, coughing, or turning in bed. The pain is usually localized on the right side of the lower abdomen or groin but can occur on either side.