Introduction <p>Although lactating graduate medical education trainees often encounter barriers when returning to work—such as perceived challenges on clinical teams—the potential benefits arising from their lactation experiences remain understudied. In particular, no prior research has examined whether working alongside lactating trainees enhances knowledge and patient care. The purpose of this study was to assess trainee perceptions of how experiences with lactation impacted their knowledge of lactation and ability to care for lactating patients.</p> Methods <p>In 2022, all residents and fellows at a large academic medical center were eligible to participate in an anonymous electronic survey. Data analyses included chi-squared testing of lactation experiences and trainee self-perceived ability to care for lactating patients.</p> Results <p>133/1319 (10%) of trainees representing 31 programs completed the survey. 87% of participants disagreed that they felt uncomfortable about a co-resident pumping in their presence. Personal experience with lactation was associated with perceived increase in knowledge of lactation (<i>p</i> = 0.012) as well as perceived ability to better care for a lactating patient (<i>p</i> &lt; 0.001) when compared with no experience with lactation, or experience through others. Among those without personal lactation experience, 71% felt their knowledge of lactation improved and 42% believed their ability to care for lactating patients was better due to their experiences working with lactating teammates.</p> Conclusions <p>Lactation does not disrupt other residents on the team and may positively impact the care of lactating patients. The benefits of lactation may extend beyond the lactating parent and their infant.</p>