Complex sentence: Lochia serosa contains serous exudate, erythrocytes, leukocytes, and cervical mucus; is pink or brown-tinged; and lasts from about the fourth to the tenth day after delivery.
Split into simpler sentences: Lochia serosa contains serous exudate, erythrocytes, leukocytes, and cervical mucus. Is pink or brown-tinged and lasts from about the fourth to the tenth day after delivery.