Maternal perception of prelabor uterine activity.

TLDR

In a prospective study of 44 women at risk for preterm labor, patients used a portable tocodynamometer to self‑mark perceived uterine contractions over 8.5 weeks after training. Patients detected only about 15% of contractions, frequently marked non‑existent activity, and perception was significantly affected only by multifetal gestation and current preterm labor, indicating that self‑detection alone is unreliable for early preterm labor detection.

Abstract

Patient perception of uterine activity was assessed objectively in 44 women at risk for preterm labor using a tocodynamometer designed for ambulatory outpatient use. The monitor allowed patient-activated marking of the data whenever contractions were perceived. After instruction in self-detection of uterine activity, tocodynamometry was performed daily for 8.5 weeks per patient. Patients identified an average of 15% of their contractions during the study (range 0-78%). Numerous marks were placed in the absence of any detectable uterine activity. Of multiple obstetric variables analyzed, only multifetal gestation and preterm labor in the current pregnancy had any significant impact on perception. Results suggest that self-detection of uterine activity may not be reliable as the only means for the earliest possible detection of preterm labor.