## **Core Concept**
Lochia refers to the vaginal discharge that occurs after childbirth, consisting of blood, bacteria, and tissue debris from the uterus. It transitions through several stages as the uterus heals postpartum. Understanding the chronological order of lochia is essential for monitoring postpartum recovery.

## **Why the Correct Answer is Right**
The correct sequence of lochia is as follows:
1. **Lochia rubra** (or lochia cruenta) - This is the initial stage, characterized by a heavy, red or brownish discharge, primarily composed of blood. It usually lasts for the first 2-3 days postpartum.
2. **Lochia serosa** - Following lochia rubra, the discharge becomes more serous (watery) and pinkish, containing less blood but more serum, white blood cells, and bacteria. This stage typically occurs from around the 4th to the 7th day postpartum.
3. **Lochia alba** - The final stage consists of a white or creamy discharge, primarily made up of leukocytes, epithelial cells, and bacteria. It can last for several weeks, up to 4-6 weeks postpartum.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option does not correctly sequence the stages of lochia.
- **Option B:** Similarly, this option misrepresents the chronological order of lochia.
- **Option D:** This option also incorrectly sequences the stages.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the progression of lochia through its stages is an indicator of uterine healing. Any significant deviation from this sequence, such as a sudden increase in bleeding after it has decreased, or a foul odor, should prompt medical evaluation to rule out complications like infection.

## **Correct Answer:** .