According to AWHONN auscultation:does not detect LTV or STV;is not continuous and may ,therefore,miss or delay detection of decreases and increases of the FHR;does not generate a graphic record for assistance in decision-making or future review;requires education,practice,skill,and a 1:1 nurse:fetus ratio;may be disrupted by uterine contractions;and may be limited by position and movement of the mother or fetus,as well as maternal size. Hope this helps. Nay