Background: In 2015-2017, the Americas experienced a highly consequencial epidemics for pregnancy and childbearing. Mainly transmitted by the mosquito Aedes aegypti, but also through sexual intercourse, the Zika virus poses the risk of congenital Zika syndrome to fetus, which includes microcephaly and other child development complications. When a public health crisis taps directly into reproductive health, typically a feminine realm, gender systems may reproduce deeply-rooted gender norms, especially those linked to cultural beliefs and expectations. This paper investigated the role of gender in two relational contexts: public health messaging to prevent Zika infections and women’s Zika and pregnancy prevention negotiation with their sexual partners during the Zika outbreak. Methods: We conducted a systematic content analysis of 94 unique pieces, governmental agencies mass-produced public health communication campaigns promoting Zika awareness. Print and online materials were collected for one year (May 2016-May 2017), such as TV ads, Internet Pop-ups, and pamphlets. We also analyzed transcripts from 16 focus groups we conducted with reproductive-aged women (18-40) in Belo Horizonte and Recife, two large cities differently affected by the Zika outbreak. Women answered open-ended questions related to personal knowledge of and experiences with the Zika virus, the related experiences of their friends and acquaintances, their primary information sources, and their perceptions of public health efforts and women’s contraceptive use.Results: Campaign pieces handling pregnancy and microcephaly demonstrated robust gendering, drastically targeting women, placing on their shoulders the responsibility for protecting a potential fetus from the disease. Campaigns neglected male´s participation on Zika prevention and contraceptive management, and failed to address Brazil´s large proportion of unplanned pregnancies. Women were placed in a double bind by being expected to prevent pregnancy and Zika amidst a relationship power dynamic that included unprotected sexual intercourse and gender norms regarding division of labor. Conclusion: Government and individual responses to the epidemics reinforced gender roles, situating pregnant women as responsible for averting mosquito bites and microcephaly, emphasizing prevention of both disease and vector among women while excluding men. Since low-socioeconomic status women possessed fewer resources to preclude infection, we also find that beyond the gender divide, this subgroup faced more pronounced Zika prevention challenges.