The appearance of mood and behavioral symptoms during pregnancy and the postpartum period has been extensively reported. While there has been much speculation about possible biologically based etiologies for postpartum disorders (PPD), none has ever been confirmed. Preliminary results from two related studies (protocols 90-M-0088, 92-M-0174) provide evidence that women with menstrual cycle related mood disorder, but not controls, experience mood disturbances during exogenous replacement of physiologic levels of gonadal steroids. The present protocol is designed to create a "scaled-down" hormonal milieu of pregnancy and the puerperium in order to determine whether women who have had a previous episode of postpartum major affective episode will experience differential mood and behavioral effects compared with controls and to determine whether it is the abrupt withdrawal of gonadal steroids or the prolonged exposure to gonadal steroids that is associated with mood symptoms. Supraphysiologic plasma levels of gonadal steroids will be established, maintained, and then rapidly reduced, simulating the hormonal events that occur during pregnancy and parturition. This will be accomplished by administering estradiol and progesterone to women who are pretreated with a gonadotropin releasing hormone (GnRH) agonist (Lupron). After eight weeks, administration of gonadal steroids will be stopped in one group of patients and controls, and a sudden decline in the plasma hormone levels will be precipitated. Another group will be maintained on supraphysiologic levels of estrogen and progesterone for an additional month. Outcome measures will include mood, behavioral and hormonal parameters as well as response to o-CRH.

• INCLUSION CRITERIA:

A. Group 1: Women with a history of postpartum depression:

1. A history of DSM-IV major depression or hypomanic/manic episode that occurred within three months of childbirth (as determined by a SCID interview);
2. has been well for a minimum of one year;
3. a regular menstrual cycle for at least three months;
4. age 18-40;
5. not pregnant, not lactating and in good medical health;
6. medication free (including birth control pills);
7. no history of puerperal suicide attempts or psychotic episodes requiring hospitalization.

B. Group 2: Women with a history of Major Depressive Disorder

1. A history of DSM-IV major depression episode(s) occurring outside of pregnancy and not within 3 months postpartum;
2. has been well for a minimum of one year;
3. a regular menstrual cycle for at least three months;
4. age 18-40;
5. not pregnant, not lactating and in good medical health;
6. medication free (including birth control pills);
7. no history of suicide attempts or psychotic episodes requiring hospitalization.

Normal Controls:

Controls will meet all criteria specified except they must not have any past or present Axis I diagnosis or evidence of menstrually related mood disorders.

EXCLUSION CRITERIA:

Any women with a current axis I psychiatric diagnosis.

Women with specific medical conditions or histories will also be excluded.