Pregnancy Calculator With HCG Level

Pregnancy Weeks Formula:

\[ Weeks \approx 2 + \frac{\log_{10}(hCG / 5)}{0.4} \]

Estimated Pregnancy Weeks:

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1. What is HCG Level Pregnancy Calculator?

The HCG Level Pregnancy Calculator estimates gestational age based on human chorionic gonadotropin (hCG) levels in maternal blood or urine. hCG is a hormone produced during pregnancy that can be used to estimate how far along a pregnancy is.

2. How Does the Calculator Work?

The calculator uses the pregnancy weeks formula:

\[ Weeks \approx 2 + \frac{\log_{10}(hCG / 5)}{0.4} \]

Where:

\( hCG \) — Human chorionic gonadotropin level (mIU/mL)
\( \log_{10} \) — Base-10 logarithm
5 — Baseline hCG level constant
0.4 — Growth rate factor
2 — Base weeks constant

Explanation: The formula accounts for the exponential growth pattern of hCG levels during early pregnancy, with hCG levels typically doubling every 48-72 hours in early viable pregnancies.

3. Importance of HCG Level Monitoring

Details: Monitoring hCG levels is crucial for confirming pregnancy viability, detecting potential complications like ectopic pregnancy or miscarriage, and estimating gestational age when ultrasound dating is not available.

4. Using the Calculator

Tips: Enter hCG level in mIU/mL. The value must be greater than 0. For best accuracy, use quantitative serum hCG test results rather than qualitative urine tests.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is hCG level for dating pregnancy?
A: hCG dating provides an estimate but is less accurate than ultrasound. Ultrasound becomes more reliable after 6-7 weeks gestation.

Q2: What are normal hCG levels by week?
A: hCG levels vary widely but generally: 3 weeks: 5-50, 4 weeks: 5-426, 5 weeks: 18-7,340, 6 weeks: 1,080-56,500 mIU/mL.

Q3: When should hCG levels be measured?
A: For dating purposes, quantitative serum hCG tests are most reliable. Serial measurements 48 hours apart provide better information about pregnancy progression.

Q4: What factors can affect hCG levels?
A: Multiple gestation, ectopic pregnancy, molar pregnancy, miscarriage, and laboratory variations can all affect hCG levels and interpretation.

Q5: Is this calculator a substitute for medical advice?
A: No, this is for educational purposes only. Always consult with healthcare providers for pregnancy dating and monitoring.