Hello, and I hope I can help you today. Changes in libido, due to the hormonal fluctuations during pregnancy, are very common and many women report increase sexual desire during pregnancy, especially in the second trimester. The reason for that is that nausea and vomiting have largely resolved by this point, and yet you are still not large enough to feel physically uncomfortable. Sexual contact, by intercourse or by any other means, is safe and healthy during pregnancy. Masturbation itself is just one form of sexual activity and therefore will not hurt you or to your baby during pregnancy. Some women occasionally feel uterine cramping after orgasm, but this is normal and usually goes away in a short period of time and is not harmful. So in summary, masturbation is not a health risk for you or your baby during pregnancy. I hope that this adequately answer your question today, and that this advice was reassuring. Best wishes for the rest of the pregnancy, Dr. Brown