Fig 2. Timeline of follow-up standardized by conception day and ZIKV serological status of mothers.

The continuous blue line represents estimated conception, calculated as the difference between date of birth and the gestational age at birth. The dashed blue line represents day of birth and the grey area between them represents the pregnancy period. Black and red dots are ZIKV BOB-negative and BOB-positive samples, respectively. (A) Mothers with evidence of probable ZIKV infection during the pregnancy period, (B) mothers with evidence of ZIKV infection before the pregnancy period, (C) mothers with evidence of ZIKV infection after the pregnancy period, and (D) mothers without evidence of ZIKV infection during the follow-up.