Question: is it normal to have low hcg levels at 4 weeks?
Answer: A low hCG level can mean your pregnancy date was miscalculated and you're not as far along as you had thought. Further testing would be needed to determine the cause, which may or may not include a miscarriage, a blighted ovum, or an ectopic pregnancy. Slow-rising hCG levels may be a sign of trouble in early pregnancy.