If specimens should not be published for a certain period, you are able to create a transaction of the type embargo and add parts of the specimen in question to this embargo. If a specimen is part of an embargo, it is shown as in the image below for current and past or future embargos .
To create an embargo choose Administration -> Transaction management -> Transaction from the menu, create a new transaction and choose the type embargo for the new transaction. The period of the embargo is defined by its Beginning and End (see below).
To see the parts of a specimen that where selected and are included in an embargo choose Administration -> Withhold data... from the menu.