deceleration
B1CEFR level
20/100Rarity: fairly common
TechnicalRegister
A transient drop in the foetal heart rate seen on the trace, which may be a sign of stress.
Repeated late decelerations on the trace prompted the midwife to escalate to the obstetric team.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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