Women postpartum, including spontaneous labor, induced labor, cesarean section, with uterine omentum shedding, containing blood, necrotic decidua and other tissues through the vagina, called lochia, this is the clinical manifestation of parturient in puerperium, belong to physiological changes.

 Blood lochia

 Because the discharge contains more blood components, the naked eye color bright red, blood clots, so named. A large number of red blood cells, necrotic decidual tissue and a small number of membranes were seen under the microscope. Expulsion of lochia lasted 3~4 days. After the bleeding slowly reduced, into serous lochia.

 Serous cache

 Because the discharge contains more slurry components, the naked eye looks red, so named. Under the microscope, a large number of necrotic decidual tissue, uterine cavity exudate and cervical mucus, red blood cells and white blood cells, visible bacteria. Expulsion of lochia lasted about 8~12 days, after the slurry slowly reduced, converted to white lochia.

 White lochia

 Because the discharge contains a large number of white blood cells, the naked eye color is white, sticky, so named. Microscopically, there are more white blood cells, necrotic decidual tissue and epidermal cells, and bacteria can be seen. The excretion of lochia lasted about 3 weeks. The main manifestations of lochia are prolonged duration of lochia, increased total amount of lochia and increased amount of bleeding.