▁or ▁kick ▁the ▁exposed ▁t issue , ▁which ▁increases ▁the ▁risk ▁of ▁ru pt uring ▁a ▁major ▁ar tery . ▁The ▁u ter us ▁can ▁become ▁easily ▁inf ected ▁as ▁it ▁bru ises ▁easily ▁and ▁can ▁become ▁covered ▁with ▁man ure . ▁ ▁C aus es ▁ ▁U ter ine ▁pro lapse ▁occurs ▁after ▁cal ving ▁when ▁the ▁cer v ix ▁is ▁open ▁and ▁the ▁u ter us ▁la cks ▁tone . ▁It ▁occurs ▁most ▁commonly ▁hours ▁directly ▁after ▁cal ving , ▁but ▁may ▁also ▁occur ▁up ▁to ▁a ▁week ▁post - cal ving . ▁▁ ▁When ▁the ▁u ter ine ▁pro lapse ▁does ▁not ▁occur ▁directly ▁after ▁cal ving , ▁it ▁can ▁be ▁more ▁dangerous ▁for ▁the ▁cow . ▁It ▁is ▁most ▁likely ▁that ▁during ▁part ur ition , ▁the ▁u ter us ▁was ▁slightly ▁e vert ed , ▁which ▁suggests ▁that ▁the ▁pro lapse ▁did ▁not ▁take ▁place ▁until ▁after ▁the ▁cal f ▁was ▁born . ▁In ▁these ▁cases , ▁the ▁u ter us ▁is ▁more ▁likely ▁to ▁be ▁inf ected . ▁This ▁increases ▁the ▁possibility ▁that ▁the ▁u ter us ▁cannot ▁be ▁replaced ▁in ▁the ▁animal , ▁and ▁instead ▁must ▁removed . ▁ ▁Fact ors ▁that ▁increase ▁the ▁risk ▁of ▁having ▁a ▁u ter ine ▁pro lapsed ▁include : ▁cal ving ▁comp lications ▁that ▁causes ▁injury ▁or ▁ir rit ation ▁of ▁the ▁external ▁birth ▁canal , ▁severe ▁stra ining ▁during ▁labour , ▁or ▁excess ive ▁pressure ▁when ▁pulling ▁out ▁a ▁cal f . ▁Non - cal ving ▁factors ▁include :