What should hCG levels be at 4 weeks?

HCG be detected at 4 weeks
HCG is detectable in urine at around 12 to 14 days after conception, when you're around 4 weeks pregnant. (The most common way to calculate your pregnancy due date is from the first day of your last menstrual period, which is typically two weeks before conception.)

4 weeks: 10 - 750 IU/L