Generally, sex is considered safe during pregnancy. IN addition, there are no studies that suggest there are any negative effects of vibrators or other sex toys used for penetration during pregnancy. If your doctor has given you the green light for sexual intercourse, then it’s generally accepted that you also have the OK to use a vibrator.
A vibrator physically does not effect the pregnant woman any differently than a penis. That is, they penetrate, stimulate and can create orgasm. A vibrator or other sex toy may vibrate, however, while a penis does not. The low-level vibrations caused by such devices should be extremely mild and should not adversely affect you or your baby.
you should be cautious about deep penetration, whether by a penis, vibrator or sex toys during the last two or three months of pregnancy. Even during this time, unless you have a low placenta late in pregnancy, such as occurs with placenta praevia.
It’s also worth mentioning that due to hormone changes during pregnancy, many women experience a lack of lubrication. Fortunately, there are several sexual lubricants that alleviate this condition. All commercially available sexual lubricants are safe for use during pregnancy. Also, it’s always important to be careful about introducing germs into the vagina while pregnant, so keep sex toys clean and don’t mix orifices.