Which symptom is NOT associated with preterm labor?

Breast tenderness is not recognized as a common symptom of preterm labor. Preterm labor typically presents with symptoms linked to uterine contractions and changes in the pelvis or vaginal area.

Symptoms such as pelvic heaviness, changes in the amount of vaginal discharge, and dull low backache are well-documented indicators that may signal the onset of preterm labor. The sensation of pelvic heaviness often comes from the pressure of the uterus on surrounding structures, while a change in vaginal discharge could indicate cervical changes or labor progression. Similarly, dull low backache may stem from the body preparing for labor as the uterus contracts.

In contrast, breast tenderness is generally associated with hormonal fluctuations throughout pregnancy rather than a direct sign of labor or preterm labor specifically. Therefore, breast tenderness does not fit within the common symptomatology of preterm labor.