Are birth control sponges safe?

Someone asked us:
Are birth control sponges (the ones that are inserted that use water to activate spermicide) safe? When I read about them it said to go to a doctor if you can’t get them out or they break apart. Is this a real issue? Are they recommended?
The birth control sponge is totally safe for most people. You put the sponge in your vagina before penis-in-vagina sex to prevent pregnancy. It covers your cervix and has spermicide to stop sperm from reaching an egg.
Putting the sponge in and taking it out is similar to using a tampon. Each sponge has a fabric loop attached to it to make it easier to pull out. You may have trouble removing your sponge every once in awhile; if you have a hard time getting to the sponge, squat and bear down (push with your vaginal muscles like you’re going to the bathroom) while reaching for it. You can grab the sponge itself and pull it out if you can’t find the fabric loop.
The vagina has an end (where your cervix is), so the sponge can’t get “lost” inside your vagina or move to other parts of your body. And it’s extremely rare for a person to not be able to get their sponge out or for it to break apart. But yes, if this does happen, visit a nurse or doctor right away. If part or all of it is left in your vagina for a long time, it can lead to infection.
Want even more protection from pregnancy? Use the sponge plus a condom. Bonus: condoms also prevent the spread of STDs.
Last pro-tip? The birth control sponge is really easy to get at the drugstore, but it’s not the most effective method. Other birth control options like condoms, the IUD, implant, shot, pill, patch, and ring are all more effective methods.
-Mylanie at PPFA