What are the benefits of raspberry leaf tea or capsules during pregnancy and labour? midwifes assure me it makes labour easier, if so how?

Proven benefits,?how: Red raspberry leaf tea has been used since ancient times and modern research confirms it reduces time of labor and birth, lessens pain and reduces the need for Cesarian sections. How it does this is not fully known but is almost certainly related to the vitamins, minerals and phytonutrients it contains. See http://tinyurl.com/ovwzd2u and http://www.ncbi.nlm.nih.gov/pubmed/10754818