Rephresh and yogurt are totally different treatments, one isn't better than the other I don't think. I just read this in another thread on here:
"I had the fishy smell, it happened more often after sex (with exposure to semen) and then got to the point where it would smell for weeks after sex and then start to fade.
I got tested for BV, yeast, and STDs - all negative. Soon after the negative results, sure enough, the stink came back with sex.
Found from online research that plain live culture yogurt: fights not only yeast but also BV, and has a Ph very similar to the vagina. And after hearing that semen is alkaline and can upset the vaginal flora, I decided to try using yogurt immediately after sex each time he comes in me.
I dip a cottonball in yogurt, tuck it in, and remove it the next morning. Since I've tried this, there has been no stink. Fresh and yummy again, finally!"