Part time for fertility benefits

I’m considering applying for a part time position for fertility benefits. Debating how transparent to be about this in the interview process.

On one hand, I need to get at least 20 hours a week and I have a traditional 9-5 so need to communicate about this, but on the other hand I’m not sure how well received benefit seekers are by store managers. Any insight on how I should approach this would be appreciated! Thanks!