Apgar Score
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Direct answer
The Apgar score is a rapid bedside rating of a newborn's condition, scored from 0 to 2 on five components at 1 and 5 minutes after birth. A total of 7 to 10 is reassuring, 4 to 6 is moderately depressed, and 0 to 3 is severely depressed. It describes how the baby looks at that moment and does not decide whether resuscitation is needed.
What you must remember
- Five components: appearance (skin colour), pulse (heart rate), grimace (reflex irritability), activity (muscle tone) and respiration (breathing effort).
- Scoring: each component is scored 0, 1 or 2, giving a total from 0 to 10.
- Pulse: an absent heart rate scores 0, a rate below 100 scores 1 and a rate above 100 scores 2.
- Timing: scored at 1 minute and 5 minutes; if the 5-minute score is 6 or less, it is repeated every 5 minutes up to 20 minutes.
- Interpretation: 7 to 10 is reassuring, 4 to 6 is moderately depressed, and 0 to 3 is severely depressed.
- Acidosis link: a low score does not prove birth asphyxia on its own, since prematurity, sedation and congenital anomalies can also lower it.
- Objective check: cord arterial blood gas, showing pH and base deficit, is the better evidence of asphyxia.
- Historical note: Virginia Apgar introduced the score in 1952.
Using the score during resuscitation
A term baby has a score of 3 at 1 minute after brief bag-mask ventilation, and the team wants to know how he is responding. The trend across serial scores tells more than any single reading.
- Score at 1 minute: record the five components as they stand, so the value reflects the baby's condition at birth.
- Resuscitate in parallel: start the standard resuscitation steps without waiting for the score, because scoring must never delay ventilation.
- Score at 5 minutes: this shows how the baby has responded to resuscitation, and it is the more prognostic reading.
- Repeat if low: if the 5-minute score is 6 or less, score every 5 minutes up to 20 minutes, so the trend is documented.
- Interpret the trend: a rising score is reassuring, while persistently low scores beyond 10 minutes are associated with poorer neurological outcome.
- Confirm with a gas: send a cord arterial blood gas when the infant is depressed, since pH and base deficit confirm acidosis.
Where the exam tries to catch you
The score is easy to misuse because it looks objective.
- Trap: deciding on resuscitation from the 1-minute Apgar. Correct: resuscitation is decided at birth from heart rate, breathing and tone, because the score is available only after the baby has been assessed.
- Trap: equating a low Apgar with birth asphyxia. Correct: the score is non-specific, since prematurity, sedation and anomalies also lower it, and cord gas gives the metabolic evidence.
- Trap: reading the score as a single pass-or-fail number. Correct: it is a graded clinical description, reported at 1 and 5 minutes and interpreted as a trend.
Frequently asked questions
What are the five components of the Apgar score?
The five components of the Apgar score are appearance, pulse, grimace, activity and respiration. Each is scored 0, 1 or 2, giving a total of 0 to 10. Heart rate is widely regarded as the most important single item.
When is the Apgar score recorded in a newborn?
The Apgar score is recorded at 1 and 5 minutes after birth. If the 5-minute score is 6 or less, it is repeated every 5 minutes up to 20 minutes. Serial scores show whether the newborn is responding to resuscitation.
Does a low Apgar score prove birth asphyxia?
A low Apgar score does not prove birth asphyxia on its own. Prematurity, sedation from maternal drugs and congenital anomalies can all lower it. Cord arterial blood gas showing acidosis is the better evidence of asphyxia.
Why is the Apgar score not used to start resuscitation?
The Apgar score is not used to start resuscitation because it is scored after the first minute, while resuscitation must begin at birth. Resuscitation decisions rely on heart rate, breathing and tone at that moment. The Apgar score is a summary of the infant's response afterwards.