**Core Concept:** Pregnancy-induced hormonal changes lead to a compensatory decrease in clotting factors to minimize excessive bleeding risk without compromising hemostasis.

**Why the Correct Answer is Right:** Clotting factor levels are influenced by pregnancy-induced hormonal changes. Progesterone, a key pregnancy hormone, has an anti-coagulant effect that leads to a decrease in several clotting factors. Specifically, the levels of clotting factors II, VII, IX, X, XI, and XIII decrease during pregnancy, while factors V and VIII remain stable and factor VI increases.

**Why Each Wrong Option is Incorrect:**

A. Factor V (Option A) is actually increased in pregnancy due to the compensatory mechanism to enhance clotting potential.

B. Factor X (Option B) is decreased in pregnancy, like other clotting factors, but its decrease is less significant compared to these factors.

C. Factor XI (Option C) is decreased in pregnancy, similar to other clotting factors.

D. Factor VIII (Option D) remains stable in pregnancy, unlike other clotting factors.

**Clinical Pearl / High-Yield Fact:** This hormonal modulation of clotting factors is essential to balance the risk of excessive bleeding while maintaining hemostasis during pregnancy. The altered clotting factor levels help in preventing excessive uterine bleeding during childbirth and subsequent postpartum hemorrhage, thus ensuring maternal safety.