**Question:** All are true about obstetric cholestasis except:

A. Cholestasis is a condition characterized by the obstruction of bile flow, leading to elevated serum levels of direct bilirubin and phosphatidylcholine.
B. Obstructive jaundice is a more severe form of cholestasis caused by anatomical obstructions, such as bile duct stones or tumors.
C. Obstructive jaundice is a rare condition, affecting only a small percentage of pregnant women.
D. Cholestasis is a benign condition, with no long-term complications for both mother and baby.

**Correct Answer:** .

**Core Concept:**
Obstetric cholestasis is a pregnancy-related liver disorder characterized by the obstruction of bile flow, leading to elevated serum levels of direct bilirubin and phosphatidylcholine. It primarily affects pregnant women and is associated with a risk of stillbirth due to fetal demise caused by impaired liver function.

**Why the Correct Answer is Right:**
Cholestasis is indeed a common pregnancy complication, but option D is incorrect because obstetric cholestasis is not always benign. Although the condition usually resolves postpartum, it can lead to significant complications for both the mother and the baby. Specifically, these complications include:

1. **Risks to the mother:**
- Premature labor: Obstetric cholestasis can cause premature labor due to a buildup of bile acids in the maternal circulation and fetal circulation.
- Increased risk of preterm birth and stillbirth: The impaired liver function caused by obstetric cholestasis can lead to fetal distress and stillbirth if not adequately treated.

2. **Risks to the baby:**
- Cholestasis increases the risk of stillbirth due to impaired liver function.
- It can cause fetal distress and early delivery, which increases the risk of complications like respiratory distress syndrome, hypocalcaemia, hypoglycaemia, and hypoxia.

**Why Each Wrong Option is Incorrect:**

A. Obstructive jaundice (option B) is a different condition caused by anatomical obstructions, such as bile duct stones or tumors. Obstructive jaundice is a more severe form of cholestasis and does not specifically relate to pregnancy.

C. Option C is incorrect because obstetric cholestasis is a common complication affecting pregnant women, affecting approximately 1% of all pregnancies.

D. Option D is incorrect because obstetric cholestasis is not always benign. Its complications for both the mother and the baby make it a serious condition that requires proper management to prevent severe outcomes.

**Clinical Pearl:**

To prevent serious complications associated with obstetric cholestasis, it is crucial to promptly diagnose and manage the condition. Treatment involves close monitoring, bed rest, and administration of intravenous ursodeoxycholic acid (UDCA) to improve fetal maturity and reduce the risk of complications. Early detection and treatment can significantly reduce the risk of stillbirth and other adverse outcomes for both the mother and the baby.