YES will definately stain undies. So advice is to use disposable throughout confinement month... Tell you i super kiasu!! I put 2 loop pad. No need to buy the belt as i bought n didnt use. All you need to do is to place 2 pad to make it long, wear a disposable undies & another of those belly support undies. As our belly will drop like deflated balloon after delivery so belly support undies is to support n hold it.