Not having a vagina, I can’t speak to how effective this would be in my hoo-hah. I think it’d make sense to get the opinions of pregnant moms who might want to try this or have tried soothing their fetuses with sound and see if they think this is effective. Playing music into the womb is nothing new, but most people think that the fetus is responding to the vibrations. I’d be curious to know if this would have the same effect.