When did Mrs. Ira Deckow have the standard pregnancy test?
standard pregnancy test refers to DESCRIPTION = 'Standard pregnancy test' from procedures;
SELECT T2.date FROM patients AS T1 INNER JOIN procedures AS T2 ON T1.patient = T2.PATIENT WHERE T1.prefix = 'Mrs.' AND T1.first = 'Ira' AND T1.last = 'Deckow' AND T2.description = 'Standard pregnancy test'