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There are various indications for C-section. In case the reason is constant in all pregnanciees like small pelvis of yours, any uterine problems etc. then only C-Section can be done. VBAC can be done provided certain criteria are met. You need to specify to your Doctor the need for C-Section in your last pregnancy
. If the problem is non-recurring, VBAC can be planned. VBAC is generally safe but always keep in mind if the labour does not progress, C-Section may be attempted.