Pregnancy induces profound cardiovascular adaptations that ensure adequate maternal perfusion and fetal development. These changes involve systemic, structural, and functional modifications, driven by hormonal, metabolic, and haemodynamic factors. Maternal blood volume expands with disproportionate plasma volume rise, causing physiologic anaemia, while increased cardiac output, stroke volume, and heart rate accommodate growing circulatory demands. Hormones such as progesterone, estrogen, and relaxin mediate vasodilation, reduce systemic vascular resistance, and remodel the vasculature. Additionally, the uteroplacental circulation undergoes extensive vascular remodelling, including spiral artery transformation, enabling low-resistance, high-capacitance blood flow essential for fetal growth. Longitudinally, adaptations evolve across trimesters, with early vasodilation and cardiac output rising in the first, peak blood volume and compliance in the second, and maximal cardiac output with potential vena cava compression in the third. The peri-partum period features dramatic shifts, including auto-transfusion during labour and rapid post-partum normalisation. Non-invasive assessments, such as echocardiography, Doppler ultrasound, impedance cardiography, and emerging wearable technologies, can enable monitoring of maternal haemodynamics and placental function. Clinical implications are also significant. Inadequate cardiovascular or uteroplacental adaptation may lead to complications such as pre-eclampsia, intrauterine growth restriction, or placental insufficiency. Standardised protocols for assessing arterial stiffness, cardiac output, venous haemodynamics, and volume homeostasis have been proposed by International Working Groups. Moreover, reference ranges and functional haemodynamic testing further aid risk stratification, whereas future integration of biomarkers, artificial intelligence, and digital health tools promises personalised patient monitoring for improved maternal-fetal outcomes.