Kegel balls during pregnancy?

I can’t find anything online about whether or not it’s safe to use kegel balls during pregnancy. I’ve been so bad with keeping up the pelvic floor workouts and I find using the balls are a lot easier. But id like to know if it’s safe to use at 23 weeks pregnant. Thanks!

EDIT: I plan to ask my midwife at my next appointment in 3 weeks, but I’d like to know if anyone on here has any info too. :)