4th HCG 4th HCG November 26, 2015November 26, 2015 by erinpsmithart Had my blood test today, its at 3100, the doubling is slowing down: 14dpo: 42 18dpo: 200 21dpo: 610 27dpo 3100 Which according to internet calculator s is normal. Cool. Advertisements Share this:TwitterFacebookGoogleLike this:Like Loading...