Shala has recently given birth to an 8-pound baby boy. The birth was celebrated by both sides of the family and little William was the pride of all involved. Six weeks after giving birth, Shala had regained her physical stamina but continued to experience the "baby blues." As time passed, she began to have upsetting thoughts about her child. As she became more and more withdrawn from those around her, she wished she had never given birth and felt profound sadness and isolation. Which of the following best captures this syndrome?
a. cyclothymic reaction
b. peripartum depression
c. postpartum dysphoria
d. transient dysphoric reaction