**Core Concept**
Pregnancy is associated with changes in various coagulation factors, leading to a hypercoagulable state. This is due to increased levels of clotting factors, including factors I, II, VII, VIII, IX, X, and fibrinogen, as well as decreased levels of anticoagulant proteins.

**Why the Correct Answer is Right**
The correction of the clotting factors in pregnancy is essential for maintaining a balance between coagulation and anticoagulation. The increased levels of clotting factors contribute to the hypercoagulable state, which is necessary for preventing excessive bleeding during childbirth. However, the levels of factor VIII are not significantly increased in pregnancy, making it the correct answer.

**Why Each Wrong Option is Incorrect**
**Option A:** Factor II levels are increased in pregnancy, contributing to the hypercoagulable state.
**Option B:** Factor VII levels are also increased in pregnancy, making it an incorrect option.
**Option C:** Factor X levels are elevated in pregnancy, further contributing to the hypercoagulable state.

**Clinical Pearl / High-Yield Fact**
It's essential to recognize that the hypercoagulable state in pregnancy increases the risk of thromboembolic events. Therefore, pregnant women with a history of thromboembolic events or those with underlying thrombophilic disorders require close monitoring and anticoagulation therapy as necessary.

**Correct Answer: D. Factor VIII.