HCG Levels by Week: Normal Range Chart After Implantation (2025)

Jan-19-2026
HCG Levels by Week: Normal Range Chart After Implantation (2025)

Human chorionic gonadotropin (HCG) is a vital hormone in pregnancy, playing a crucial role in confirming and monitoring pregnancy health. Whether you’re naturally conceiving or undergoing fertility treatments like IVF, understanding HCG levels can help you track your pregnancy progress effectively. In this guide, we’ll explore normal HCG ranges, what low or high levels indicate, and when to consult a fertility specialist at New World Fertility.

Is Low HCG Always a Problem?

Low HCG levels are not always a problem; in early or IVF pregnancies, steady doubling over time is more important than the first value.


HCG Levels Chart by Week After Implantation

Include a simple table:

Weeks After ImplantationNormal HCG Range (mIU/mL)
3–4 weeks5 – 426
4–5 weeks19 – 7,340
5–6 weeks1,080 – 56,500
6–7 weeks7,650 – 229,000

What Is HCG and Why Is It Important?

  • HCG is produced by the placenta after implantation.

  • It helps maintain the corpus luteum, supporting progesterone production for early pregnancy.

  • Pregnancy tests detect HCG in urine and blood to confirm conception.

Low vs. High HCG Levels: What They Mean

Low HCG Levels:

  • Possible miscarriage risk
  • Ectopic pregnancy
  • Blighted ovum (empty gestational sac)
  • High HCG Levels:

  • Multiple pregnancies (twins/triplets)

  • Molar pregnancy

  • Chromosomal abnormalities (e.g., Down syndrome)

When to Seek Help? If HCG levels are not doubling properly or are too high/low, consult New World Fertility for expert advice.

Also Read: 4 Weeks Pregnant HCG Levels


How Is HCG Tested?

  • Urine Test: Used in home pregnancy kits, detects HCG but may show false negatives if taken too early.

  • Blood Test: Measures exact HCG levels and is more accurate for pregnancy confirmation.

  • HCG testing is often repeated every 2-3 days in early pregnancy to ensure proper progression.

hCG Levels in IVF Pregnancies

  • After embryo transfer, HCG levels are monitored to confirm implantation.

  • Normal HCG rise in IVF pregnancies may differ slightly from natural conception.

  • Day 10-14 post-transfer: HCG levels above 100 mIU/mL are typically a positive sign.

Concerned about your HCG levels after IVF? Consult our fertility experts at New World Fertility.

Also Read: 2 Weeks Pregnant HCG Levels


Conclusion

Monitoring HCG levels is a key part of pregnancy tracking. Whether you are naturally conceiving or undergoing IVF, understanding your HCG progression can help ensure a healthy pregnancy. If you have concerns about your HCG levels, reach out to New World Fertility for expert guidance.

Book a consultation today with New World Fertility and ensure the best care for your pregnancy journey.
Frequently Asked Questions About HCG Levels

What is a good HCG level after implantation?

There is no single “good” HCG level after implantation. Normal HCG values vary widely, but healthy pregnancies usually show a steady rise in HCG levels over time.

How fast should HCG double?

In early pregnancy, HCG levels typically double every 48 to 72 hours, especially during the first few weeks after implantation.

Can HCG levels be high and still normal?

Yes, high HCG levels can still be normal and may be seen in healthy pregnancies, multiple pregnancies, or due to individual hormonal variation.

When should HCG be tested after IVF?

After IVF, HCG is usually tested about 9 to 12 days after embryo transfer to confirm implantation and early pregnancy.

Can HCG levels predict twins?

Higher-than-average HCG levels may be associated with twin or multiple pregnancies, but HCG alone cannot reliably confirm twins.