<prompt> The sympathetic fibres of uterus are derived from which segments of veibrae ?T12 - L1T11 - L2T1 - S2T12 - L2  <response>: Sympathetic nerves from T12, LI segment of spinal cord produce uterine contraction and vasoconstriction. The parasympathetic nerves S2, S3, S4 produce uterine inhibition and vasodilatation. Ref : B D Chaurasias Human Anatomy , seventh edition , volume 2 , pg.no., 422. 