Women's political representation in Brazil is regulated by Law 12.034 of 2009, which changed art. 10, §3, of Law 9.504 of 1997, providing that political parties must register at least a quota of 30% of candidates of each gender in each election. Nonetheless, effective inclusion effects on political representation, especially in the House of Representatives, has been constantly breached by political parties that manipulate the quotas to have access to electoral funding. This essay aims at showing that women's political representation was not strongly affected by institutional transitional reforms that could propitiate effective inclusion., as transformative reforms were not the center of the discussion. Using the methodology of case study to approach the elections of 2018, the objective is to show how political parties have contributed to stall women's political participation in Brazil using the quotas as political engineering.