Question: how can you tell if you're having twins?
Answer: Doppler Heartbeat Count. ... 
Elevated hCG Levels. ... 
Abnormal AFP Test Results. ... 
Twin Pregnancies Measure Large for Gestational Age. ... 
Weight Gain. ... 
Excessive Morning Sickness. ... 
Early or Frequent Fetal Movement. ... 
Twins Pregnancy = Extreme Fatigue.