Erin Maher went to her obstetrician for a routine appointment when she was 14 weeks pregnant. She left with a breast cancer diagnosis.“I just stared at her,” Maher, 32, said. “I couldn’t even react.”Maher and her husband, Brandon, left the doctor’s office believing they would lose the baby they didn’t even think they could conceive. The couple had tried for three years to get pregnant with their son, only to be told by doctors they were infertile. After they stopped trying, they were surprised by a positive pregnancy test. Their son, Liam, is now 2 1/2 years old.They had assumed they wouldn’t be able to conceive again but were thinking about trying anyway. Two weeks later, in late May, they learned Erin Maher was pregnant.Then, on Aug. 3, Maher learned she had breast cancer and would need chemotherapy and surgery.“For that 24 hours after, my husband and I assumed we would lose the baby,” Maher said.But the Vancouver couple learned that because Maher was in the second trimester of pregnancy, she could undergo chemotherapy without putting the baby’s life at risk.While the diagnosis was difficult to hear, Maher was heartbroken by what it would mean for her unborn child.“One of the first thoughts that went through my head was, ‘I’m not going to be able to breast-feed my baby,’ ” she said.Maher breast-fed Liam until he was more than 2, when she learned she was pregnant again, and wanted desperately for her second child to receive breast milk.