Read the following statements about human reproduction :
I. A tertiary follicle is characterized by the presence of a fluid - filled cavity called the antrum .
II. The labia minora are fleshy folds of tissue , extend down the mons pubis , and surround the vaginal orifice .
III. Most of the major organ systems of the fetus formed by the end of the second month of pregnancy .
IV. The mammary glands of the female start producing milk during pregnancy.
How many statements are incorrect from from the above

Options

A. One
B. Two
C. Three
D. Four

Answer

To determine how many statements about human reproduction are incorrect, let's analyze each statement step by step.

### Step 1: Analyze Statement I
**Statement I:** A tertiary follicle is characterized by the presence of a fluid-filled cavity called the antrum.

- **Analysis:** This statement is true. A tertiary follicle (also known as a Graafian follicle) does indeed have a fluid-filled cavity called the antrum. This is a key characteristic of tertiary follicles in the ovarian cycle.

### Step 2: Analyze Statement II
**Statement II:** The labia minora are fleshy folds of tissue, extend down the mons pubis, and surround the vaginal orifice.

- **Analysis:** This statement is incorrect. The labia minora are not fleshy folds that extend down the mons pubis; rather, they are thin, inner folds located within the labia majora and do not surround the vaginal orifice in the manner described. The labia majora are the fleshy folds that extend down the mons pubis.

### Step 3: Analyze Statement III
**Statement III:** Most of the major organ systems of the fetus formed by the end of the second month of pregnancy.

- **Analysis:** This statement is also incorrect. While some organ systems begin to develop during the first trimester, most major organ systems are not fully formed until around the end of the first trimester (approximately 12 weeks), not just by the end of the second month.

### Step 4: Analyze Statement IV
**Statement IV:** The mammary glands of the female start producing milk during pregnancy.

- **Analysis:** This statement is incorrect. The mammary glands do not start producing milk during pregnancy; they prepare for lactation, but actual milk production typically begins after delivery, triggered by hormonal changes.

### Conclusion
Now that we have analyzed all four statements:
- Statement I: True
- Statement II: Incorrect
- Statement III: Incorrect
- Statement IV: Incorrect

**Total Incorrect Statements:** 3

### Final Answer
There are **3 incorrect statements** from the above.

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