Which is a key sign indicating the onset of labor?

The onset of labor is often signified by distinct physical changes in the body, one of which is the rupture of membranes, commonly referred to as "water breaking." This event typically results in a noticeable gush of amniotic fluid from the vagina, indicating that the protective barrier around the fetus has been compromised. The occurrence of this gush is often a sign that labor is imminent, prompting the pregnant individual to prepare for delivery.

Other signs that may suggest approaching labor can vary widely, but are generally more subtle compared to the unmistakable nature of ruptured membranes. While gradual changes in fetal movement or energy levels can be experienced in late pregnancy, these are not definitive indicators of labor's onset. Additionally, a strong desire to sleep could simply be a response to fatigue or discomfort in late pregnancy rather than a clear sign of labor beginning. Hence, the gush of water indicating ruptured membranes stands out as a direct and critical sign that labor is likely about to commence.