<p><strong>Background</strong>: The incidence of Covid-19 in women, pregnant, and breastfeeding mothers is still high. Currently, the government is trying to prevent and break the chain of Covid-19 transmission by vaccination. However, knowledge about Covid-19 vaccination is still limited. Therefore, Indonesian Obstetrics and Gynecology Association/<em>Perkumpulan Obstetri dan Ginekologi Indonesia</em> (POGI) members, as the spearhead of women's health, play an essential role in breaking the chain of transmission by providing knowledge about Covid-19 vaccination.</p><p><strong>Methods</strong>: All member of POGI and Youth POGI in Surakarta was educated by online method via the webinar zoom application. The level of knowledge was evaluated pre and post-webinar by using a questionnaire to see the significance.</p><p><strong>Result:</strong> Analysis of 110 participants with paired t-test obtained an average pretest value of 44.82 while the average post-test value was 57.45, with a significance value of p=0.001 (p<0.05). The results of the analysis with the Chi-square test obtained p = 0.002 (p <0.05) and OR = 23.40.</p><p><strong>Conclusion</strong>: There is an increased understanding of preventing and breaking the chain of transmission of Covid-19 in women, pregnant, and breastfeeding mothers by vaccinating youth POGI and POGI members after webinar and discussion, with a significance value of p=0.001 (p<0.05). Webinars and discussions on preventing and breaking the chain of transmission of Covid-19 to women, pregnant, and breastfeeding mothers with vaccination by researchers provided 23.40 times better understanding than before the webinar and discussions were given.</p><p> </p><p> </p><p> </p>