Physiological vaginal discharge is normal, but various factors can cause pathological changes, referred to in medical terms as leukorrhea

If dark brown discharge appears before or after menstruation and is accompanied by other abnormal symptoms, it could signal underlying conditions such as vaginal infections, hormonal imbalances, or gynecological diseases.

Postpartum hormonal changes occur immediately after the baby is born at a rate as fast as when pregnancy begins. Hormone levels in a woman's body undergo significant changes in the first few hours to many days after childbirth.