Which symptom is a preliminary sign of labor?

Lightening is considered a preliminary sign of labor, as it refers to the process where the fetus descends into the pelvic cavity, leading to a shift in maternal body dynamics. This shift can provide some relief from upper abdominal pressure, as the baby moves down and away from the diaphragm, allowing for easier breathing. Lightening typically occurs in the days or weeks leading up to labor, signaling that the body is preparing for the upcoming delivery.

Increased pressure in the pelvis is certainly something that can occur as the baby engages, but it is more of a symptom experienced during and after lightening. Transitional contractions indicate a more advanced stage of labor, and a frequent urge to push is a sign that labor is actively progressing, rather than a preliminary indicator of its onset. Recognizing lightening helps expectant mothers and healthcare providers understand that labor may be approaching soon.