When should I contemplate the acquisition of a pregnancy pillow to optimize my comfort during those transformative months? As my body undergoes numerous physiological changes, including the inevitable expansion of my abdomen and alterations in my center of gravity, might not a specialized pillow serve as an invaluable ally in alleviating discomfort? Could it be that the early stages of pregnancy, when sleep disturbances often commence, signal the ideal moment to invest in this supportive accessory? Should I consider the varying shapes and sizes available, potentially influencing my decision based on personal preferences and sleeping positions? Additionally, as I progress into the later trimesters, will my burgeoning belly necessitate more tailored support? How do the distinct features of differing pillows, such as contouring capabilities and material composition, weigh into the timing of my purchase? At what point will I truly appreciate the benefits of such a supportive sleep aid in my nightly routine?