Women's attitudes towards abortion are often assessed infrequently in their lives. This measurement may not capture how lifetime events, such as reproductive experiences, potentially influence attitudes towards abortion. Although reproductive attitudes can fluctuate with life's circumstances, there is little research on how abortion attitudes may change when a woman suspects she might be pregnant. Using an intensive longitudinal dataset collected in Michigan, the Relationship Dynamics and Social Life (RDSL) study (2008–2012), we test the relationship between the timing of pregnancy scares and uncertainty and abortion attitudes using hybrid effects models. We find that women become less supportive of abortion while experiencing a pregnancy scare or uncertainty; however, this association exists only during a scare or uncertainty. These findings highlight that abortion attitudes may change when a woman suspects she might be pregnant. However, attitudinal change may not last past this period.