Consider the question. At the beginning of Season 8, Pam is revealed to be pregnant with her and Jim's second child, Philip Halpert. The child coincided with Jenna Fischer's actual pregnancy. She begins her maternity leave after "Pam's Replacement". Pam returns in "Jury Duty", where she and Jim bring Cece and Phillip into the office. In both "Tallahassee" and "Test the Store" Pam is shown helping, and developing her friendship with Andy.

Answer this question based on the passage: when did pam get pregnant again on the office?
 What is the step-by-step reasoning process to arrive at the answer: At the beginning of Season 8?
This is the relevant information: At the beginning of Season 8, Pam is revealed to be pregnant with her and Jim's second child, Philip Halpert.