D C92869 Relaxation Time between Uterine Contractions Contraction Interval Relaxation Time between Contractions The period between uterine contractions during labor when the uterine smooth muscles relax. C70766 Quantitative Concept C90259 NICHD Pediatric Terminology C C92907 Uterine Contraction Interval Contraction Interval Relaxation Time between Uterine Contractions The time interval between uterine contractions during labor. C70766 Quantitative Concept C90259 NICHD Pediatric Terminology D C92869 Relaxation Time between Uterine Contractions Contraction Interval Relaxation Time between Contractions The period between uterine contractions during labor when the uterine smooth muscles relax. C70766 Quantitative Concept C92712 NICHD Pregnancy & Childbirth Terminology C C92907 Uterine Contraction Interval Contraction Interval Relaxation Time between Uterine Contractions The time interval between uterine contractions during labor. C70766 Quantitative Concept C92712 NICHD Pregnancy & Childbirth Terminology