The Effect of Fluids on Aortic VTI During C-section

This study looks at how fluid given through a drip (intravenous fluids) during a caesarean section affects blood flow in the aorta — the body's main artery. When a spinal anaesthetic is given for a C-section, blood pressure can drop suddenly, which can be dangerous for both mother and baby. The way and timing of giving IV fluids may affect how well blood pressure is maintained. Blood flow is measured using a special device placed at the back of the throat (transoesophageal Doppler), providing real-time data on how fluids change aortic blood flow patterns during the procedure. You may be eligible if: - You are a healthy pregnant woman aged 18–35 - You are at least 37 weeks pregnant with a single baby - You are scheduled for a planned caesarean section under spinal or combined spinal-epidural anaesthesia - You are generally healthy (ASA physical status 2) You may NOT be eligible if: - You are having an emergency C-section - You have high blood pressure, pre-eclampsia, diabetes, asthma, heart or kidney problems - Your BMI is above 40 - You are over 35 years old - You are unable to give informed consent Talk to your doctor to see if this trial is right for you.