Background: Lactational Amenorrhea Method (LAM) is a natural contraceptive method that is extremely safe, effective, affordable, and accessible to a large number of mothers during the first six months postpartum.  Aim: This research aimed to evaluate effect of social platform-based education on primipara women's perception of lactational amenorrhea and its basic criteria as a contraceptive method. Research design: A quasi-experimental research design (One-Group, pre-posttest) was utilized. Setting: The research was conducted at postpartum unit and Obstetrics and Gynecological out-patient clinic at Benha University hospitals. Sampling: A purposive sample of 140 women attending the above-mentioned setting for six months and fulfill inclusion and exclusion criteria was recruited. Tools of data collection: A structured self-administered survey measuring demographics and obstetric history, a Women's knowledge questionnaire and Women's attitude questionnaire were the three tools used. Results: There was a highly statistically significant difference between the pre- and post-intervention phases in terms of the sample's knowledge and attitude toward lactational amenorrhea and its basic criteria or standards.  Also, there was a positive correlation between total knowledge and total attitude scores regarding lactational amenorrhea and its basic criteria before and after the intervention, which was a highly statistically significant Conclusion: Social platform based - education had a positive effect in improving women's knowledge and attitude regarding lactational amenorrhea as a natural contraceptive method. Recommendations: Activate planned teaching program to create awareness among women regarding on lactational amenorrhea as a natural contraceptive method in an attempt to prevented unplanned pregnancy.