Yes, you can have sex when you are menstruating. You may bleed during sex, so be prepared. Communicating with your partner about your period may help you to feel more comfortable.
You can also get pregnant when you are menstruating. Use a condom every time you have sex (anal, oral, vaginal, hand) to reduce the risk of pregnancy, STIs and HIV. Dual method use (using a condom or vaginal condom along with another method of birth control like the pill, patch, ring or IUD) provides the best protection from pregnancy and STIs.