Following Chloe O'Brian's unexpected collapse, she was taken to CTU medical. Dr. Hastings told Morris, her ex-husband, that her injuries weren't severe and were probably a symptom of dehydration or lack of sleep.
Dr. Hastings took some tests and answered Morris' call only minutes later. Dr. Hastings explained the tests weren't complete, but even if they were, he wouldn't tell Morris, because he is Chloe's ex-husband and he is only allowed to give out medical information to her family.
Morris decided to speak with Chloe himself and eventually learned that she was pregnant with his child.