嗯，以前也听说过可是那么多妈没上epi不是也都生了嘛，为嘛就我一痛就肌肉收缩呢？郁闷。。。
因人而异吧，也有因为上epi而开得慢的
据说epidural增加了剖腹产率，但貌似在医学上还是很有争议的
http://www.medicine.ox.ac.uk/bandolier/band34/b34-3.html
http://www.scienceandsensibility.org/?p=2014
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1481670/
Contrary to the conclusion of the Cochrane meta-analysis of EA compared with narcotic analgesia, EA given before the active phase of labour more than doubles the probability of receiving a CS. If given in the active phase of labour, EA does not increase rates of CS.
http://www.medicine.ox.ac.uk/bandolier/band34/b34-3.html
http://www.scienceandsensibility.org/?p=2014
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1481670/
Contrary to the conclusion of the Cochrane meta-analysis of EA compared with narcotic analgesia, EA given before the active phase of labour more than doubles the probability of receiving a CS. If given in the active phase of labour, EA does not increase rates of CS.
Huasing Association 1999 - 2013