My HCG on day 14 is 200. Is that 'too high'?
No. With IVF, varied implantation timing means HCG at day 14 ranges 20–500+.
IVF & Treatment Basics
Beta HCG — human chorionic gonadotropin — is the hormone that confirms pregnancy. A positive blood test measures it. Here's what HCG is, what the numbers mean, and why doubling matters.
HCG is a hormone secreted from the growing baby after it has implanted itself into the uterus. It tells your body to keep making progesterone and to continue the lining in your uterus, thus preventing you from having your period. HCG is only found during pregnancy.
A positive beta HCG test measures the hormone's concentration in mIU/mL (milliunits per millilitre):
These are approximate; individual variation is enormous. A number is only meaningful in trend—does it double in 48 hours?
In early pregnancy, HCG approximately doubles every 48–72 hours up until 8–10 weeks. A doubling pattern suggests:
A slower rise (not doubling every 72 hours) may suggest:
You might expect multiple HCG tests, but most clinics test once (day 14) or twice (day 14 and day 17). Why?
If your clinic requests multiple HCG tests, it's usually because your first test was borderline low or ectopic pregnancy is a concern.
HCG levels continue to increase up to ~12 weeks, after which they become constant before falling. Beyond 12 weeks, HCG testing ceases, and your OB/GYN handles your pregnancy without the use of HCG.
Q: My HCG on day 14 is 200. Is that 'too high'?
A: No. With IVF, varied implantation timing means HCG at day 14 ranges 20–500+.
Q: My HCG doubled only every 84 hours, not 72. Should I worry?
A: Not necessarily. 'Doubling every 48–72 hours' is a range; 84 hours is just outside it but still often viable. Ultrasound at 6 weeks will confirm.
No. With IVF, varied implantation timing means HCG at day 14 ranges 20–500+.
Not necessarily. 'Doubling every 48–72 hours' is a range; 84 hours is just outside it but still often viable. Ultrasound at 6 weeks will confirm.