Hello, and I hope I can help you today. Hormonal changes during pregnancy normally causes fluctuations in the consistency, amount, color, and odor of vaginal discharge. Furthermore, during the second trimester pregnancy, due to changes in your cervix, more mucus secretion is normal. This may produce the yellowish tint that you have been noticing. As long as your discharge does not have a strong fishy odor, and does not itch, likely physiologically normal and requires no further diagnosis or treatment. If you ever notice any discharge that is tinged with blood, or that is accompanied by lower abdominal cramping or is more the consistency of water, you should mention this to your prenatal care provider or be evaluated as these can be indications of other problems. But in summary, the symptoms that you describe are completely normal and are not harmful to the pregnancy. I hope I was able to adequately answer your question today, and that my advice was helpful. Best wishes for the rest of the pregnancy, Dr. Brown