a clean sample of amniotic fluid had to be collected. Two methods were used. An extraction and a drain collection.
Although i do not have site permission the article at this site mentions the techniques used to collect a clean amniotic sample during delivery.
As per google...
A"t this centre amniotic fluid is routinely. collected. per. vaginarn at surgical induction of. labour in order to collect data on the correlation ..."
http://www.blackwell-synergy.com/doi/abs/10.1111/j.1471... I have seen this done and it was not at all traumatic to either the mother or child.
Edited for spelling