Hormone that prepares and maintains the uterus dueing pregnancy is produced by

Options

A. Corpus albicans
B. Corpus luteum
C. Graafianfoolicles
D. Corpora Cardiaca.

Answer

To answer the question about which hormone prepares and maintains the uterus during pregnancy, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Hormones Involved**: The key hormones that are crucial for preparing and maintaining the uterus during pregnancy are progesterone and estrogen.

2. **Understand the Source of These Hormones**: After fertilization occurs, the hormones progesterone and estrogen are primarily produced by a structure in the ovary.

3. **Determine the Structure Responsible**: The structure responsible for the production of these hormones is the corpus luteum. This structure forms from the ovarian follicle after ovulation.

4. **Eliminate Incorrect Options**:
- **A. Corpus albicans**: This is a scar tissue that forms from the corpus luteum when it degenerates, and it does not produce hormones.
- **C. Graafian follicle**: This is the mature ovarian follicle that releases the egg but does not produce progesterone or estrogen after ovulation.
- **D. Corpora cardioca**: This is not relevant to human reproduction; it is related to the heart in some animals.

5. **Conclude the Answer**: Since the corpus luteum is responsible for producing progesterone and estrogen to maintain the uterus during pregnancy, the correct answer is **B. Corpus luteum**.

### Final Answer:
The hormone that prepares and maintains the uterus during pregnancy is produced by **B. Corpus luteum**.