Which of these statements about decidua is false?

Options

A. Decidua cells are enlarged, vacuolated endometrial cells filled with glycogen and lipids.
B. Decidua parietalis refers to the part of the decidua which gives rise to maternal part
C. Decidua capsularis refers to the part of the decidua which overlies the embryo and separates it from the uterine cavity.
D. These cells are called decidua because they are shed off during parturition .

Answer

To determine which statement about decidua is false, we need to analyze each option provided in the question. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand what Decidua is
Decidua refers to the modified endometrium (the mucosal lining of the uterus) that forms during pregnancy. It is created through a process called decidualization, influenced by the hormone progesterone.

### Step 2: Identify the parts of Decidua
Decidua consists of three main parts:
1. **Decidua Basalis**: Interacts with the trophoblast and forms part of the placenta.
2. **Decidua Capsularis**: Covers the embryo and separates it from the uterine cavity.
3. **Decidua Vera (or Decidua Parietalis)**: The remainder of the decidua that fuses with the decidua capsularis by the fourth month of gestation.

### Step 3: Analyze each option
- **Option A**: "Decidua cells are enlarged vacuolated endometrial cells filled with glycogen and lipids."
- **True**: This accurately describes the characteristics of decidual cells.

- **Option B**: "Decidua peritalis refers to the part of decidua which gives rise to maternal part."
- **False**: This statement is misleading because the entire decidua (not just the decidua parietalis) contributes to the maternal part of the placenta.

- **Option C**: "Decidua capsularis refers to the part of decidua which overlies the embryo and separates it from the uterine cavity."
- **True**: This correctly describes the function of the decidua capsularis.

- **Option D**: "These cells are called decidua because they are shed off during parturition."
- **True**: This statement is accurate as the decidual cells are shed during childbirth.

### Step 4: Conclusion
After analyzing all the options, we find that **Option B** is the false statement regarding decidua. Therefore, the correct answer is **Option B**.

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