---
title: What is %FCOHb?
description: What is %FCOHb?
---

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# What is %FCOHb?

## What is %FCOHb?

When a person smokes cigarettes whilst pregnant, the foetus is exposed to elevated levels of %COHb, and as a result the foetal blood will have an increased level of %COHb(1), we refer to this calculation as %FCOHb (% Foetal Carboxyhaemoglobin). Simply put, %FCOHb is an estimation of how much CO a foetus has been exposed to.

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### References

*1. Causes and clinical significance of increased carboxyhemoglobin \[Internet\]. Acutecaretesting.org. 2021 \[cited 23 April 2021\]. Available from: [https://acutecaretesting.org/en/articles/causes-and-clinical-significance-of-increased-carboxyhemoglobin](https://acutecaretesting.org/en/articles/causes-and-clinical-significance-of-increased-carboxyhemoglobin)*

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