Answer:
C. peripartum onset. (postpartum onset)
Explanation:
Peripartum onset generally occurs with the major depression and is, therefore, include "postpartum depression as well. Peripartum depression is described as one of the major or big "depressive episodes" that women experience during her pregnancy as well as after delivery within the first four weeks of her delivery.
However, the postpartum depression is said to be experienced by a woman in two different forms i.e, early and late-onset.
In the question above, the given statement signifies that Martha is experiencing peripartum onset with major depression.