It is common for the color of vaginal discharge to vary during pregnancy. The changes in color can be influenced by hormonal fluctuations, changes in vaginal pH levels, or the presence of an infection. Yellow or white discharge is generally considered normal as long as there are no other accompanying symptoms such as itching, burning, or a foul odor. However, if you experience any discomfort or notice any unusual symptoms along with the color change, it is important to consult your healthcare provider for further evaluation and appropriate treatment if necessary. They will be able to determine if there is an underlying issue that needs attention.