EPO is evening primrose oil. It's a natural prostaglandin, which is what helps to soften and dilate the cervix. You insert it and take it orally to help prepare your cervix for ripening and labour. RLT is raspberry leaf tea/tablets. Raspberry leaf is a uterine toner, as the uterus is one big muscle, so it prepares and tones the uterus, to condition it to have very efficiently working contractions during labour.