prep a what?

[Medical Kid]

what does "prep a diafram" mean when a girl says it?

[BeautifulSilence]

She probably means to prepare a diaphragm.

The diaphragm is a cervical barrier type of birth control. It is a soft latex or silicone dome with a spring molded into the rim. The spring creates a seal against the walls of the vagina.
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The diaphragm must be inserted sometime before sexual intercourse, and remain in the vagina for 6 to 8 hours after a man's last ejaculation.

I believe that it can take some time to actually place it correctly... Is it possible that's what it means?

Or was it said in a different scenario?