<p class="abstract"><strong>Background:</strong> The objective of the present study was to compare the effects of perineal massage, vaginal dilator and pelvic floor muscles training on the perineal integrity of primiparae women<span lang="EN-IN">. </span></p><p class="abstract"><strong>Methods:</strong> Primigravidae women over 18 years old will be selected, from the 32th gestational week and wishing to have a vaginal delivery<span lang="EN-IN">.</span>Pregnant women will be randomly allocated from a sequence generated by a computer program into three groups: perineal massage, vaginal dilator and pelvic floor muscles training. The technique should be practiced from the 34th week of pregnancy until the beginning of labor. Randomization will be done by a researcher who was not involved with the recruitment, assessment and treatment of the participants. All participants will undergo a clinical and functional assessment of the pelvic floor before the beginning of the technique practice, as well as a reassessment of these items and an assessment of perineal integrity between 45 and 60 days after delivery for a blind physiotherapist regarding the interventional procedures. The evaluative procedures will be done by a ‘blinded’ physiotherapist in relation to the intervention procedures.<span lang="EN-IN"> The outcome will be determined by </span>the perineal integrity by the presence or absence of perineal laceration as well as their characteristics observed immediately after delivery<span lang="EN-IN">. </span></p><p class="abstract"><strong>Conclusions:</strong> The knowledge of the effects of antenatal pelvic floor preparation techniques on the perineal integrity and pelvic floor muscles function after delivery, will allow a better choice about which approach is the best to pregnant women to prevent perineal trauma.</p>