Decidua capsularis lies between

Options

A. Myometrium and endometrium
B. Uterine cavity and embryo
C. Embryo and myometrium
D. Uterine cavity and myometrium

Answer

To answer the question "Decidua capsularis lies between," we need to understand the anatomical relationships within the uterus during pregnancy.

### Step-by-Step Solution:

1. **Understanding Decidua**: After implantation of the embryo into the uterine wall, the endometrium (the inner lining of the uterus) is referred to as decidua. This is a temporary structure that supports the embryo.

2. **Parts of Decidua**: The decidua is divided into three parts:
- **Decidua basalis**: This is the part of the decidua that is located beneath the implanted embryo.
- **Decidua capsularis**: This part surrounds the embryo and is located above it.
- **Decidua parietalis**: This is the part of the decidua that lines the rest of the uterine cavity.

3. **Locating Decidua Capsularis**: The decidua capsularis is specifically the layer that lies between the embryo and the uterine cavity. It acts as a barrier and separates the developing embryo from the uterine cavity.

4. **Conclusion**: Therefore, the decidua capsularis lies between the uterine cavity and the embryo.

### Final Answer:
Decidua capsularis lies between the uterine cavity and the embryo.

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