FBS is an invasive procedure, is cumbersome, uncomfortable for
both the woman and the obstetrician [4,15] and an adequate
sample is obtained successfully in 79.4% of attempted cases [5]. Its
results are affected by the sampling technique, handling of the
sample and processing these results using a blood gas analyser
machine [16]. Even under well-controlled experimental conditions,
FBS can result in inaccurate results from aerobic contamination
[17].