Ectopic pregnancy is a classic "do not miss" diagnosis in any emergency department or GP surgery. Since you're prepping for the UKMLA AKT, it's really important to get the NICE guidelines (CG126) down, as they love testing the specific cut-offs for management.

Risk Factors

Think of anything that might slow down or physically block the fertilized egg's journey through the fallopian tube:

• Previous ectopic pregnancy (the biggest risk factor!)
• Pelvic Inflammatory Disease (PID) or previous tubal surgery (scarring)
• Endometriosis
• Assisted reproduction (like IVF)
• Smoking (it actually affects tubal motility)
• IUCD (the coil): While it prevents pregnancy very well, if a pregnancy does occur, it's more likely to be ectopic.

Diagnosis with Beta-hCG

In a healthy intrauterine pregnancy, hCG levels should roughly double every 48 hours. In an ectopic, they often rise more slowly or plateau.

1. The Discriminatory Zone: This is the hCG level at which you'd expect to see a pregnancy on a Transvaginal Ultrasound (TVS). Usually, this is around 1,500 IU/L.
2. Pregnancy of Unknown Location (PUL): If the hCG is >1,500 and the uterus is empty on scan, you have to assume it's an ectopic until proven otherwise.
3. The 48-hour Rule:
   • >63% rise: Likely a viable intrauterine pregnancy.
   • <63% rise (but still rising): Highly suspicious for an ectopic.
   • Falling levels: Likely a failing pregnancy (miscarriage or resolving ectopic).

Management Options

NICE breaks this down into three main pathways based on how stable the patient is and how high the hCG is.

==High-Yield Tip: If the patient is hemodynamically unstable (hypotensive, tachycardic), forget the hCG levels—they need an immediate laparotomy.==

Let me find some high-yield lessons and a flowchart to help you visualize the management algorithm!