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HCG Levels Calculator by Pregnancy Week
Track your pregnancy hormone levels with our easy-to-use calculator. Compare your HCG measurements against typical ranges for your gestational week and visualize your results with interactive charts.
Enter Your HCG Information
Your HCG Analysis
Your HCG Level
Typical Range for Week
Average for Week
HCG Trend Analysis
Understanding HCG Levels During Pregnancy
Human Chorionic Gonadotropin (HCG) is a hormone produced by the placenta after implantation. It's the hormone detected by pregnancy tests and plays a crucial role in maintaining pregnancy during the first trimester.
How HCG Levels Change During Pregnancy
HCG levels rise rapidly in early pregnancy, typically doubling every 48-72 hours during the first 4-8 weeks. The rate of increase slows around weeks 8-11, then gradually declines and stabilizes for the remainder of the pregnancy.
Typical HCG Ranges by Week
It's important to note that HCG levels can vary significantly between individuals and still represent a healthy pregnancy. The following ranges are typical guidelines:
- 3 weeks: 5-50 mIU/mL
- 4 weeks: 5-426 mIU/mL
- 5 weeks: 18-7,340 mIU/mL
- 6 weeks: 1,080-56,500 mIU/mL
- 7-8 weeks: 7,650-229,000 mIU/mL
- 9-12 weeks: 25,700-288,000 mIU/mL
- 13-16 weeks: 13,300-254,000 mIU/mL
- 17-24 weeks: 4,060-165,400 mIU/mL
- 25-40 weeks: 3,640-117,000 mIU/mL
What Abnormal HCG Levels Might Indicate
Lower than expected HCG levels might indicate: ectopic pregnancy, potential miscarriage, or miscalculation of pregnancy dating. Higher than expected HCG levels could suggest: multiple pregnancy (twins/triplets), molar pregnancy, or miscalculation of pregnancy dating.
Importance of HCG Trend (Doubling Time)
In early pregnancy, the rate of HCG increase is often more important than the absolute value. A healthy pregnancy typically shows HCG doubling every 48-72 hours. However, as pregnancy progresses, the doubling time increases, and after 6-7 weeks, ultrasound becomes a more reliable indicator of pregnancy health.
When to Consult Your Healthcare Provider
While this calculator provides helpful information, always consult with your healthcare provider for proper interpretation of your HCG levels. They will consider your complete medical history, symptoms, and may order additional tests like ultrasound for comprehensive assessment.
Frequently Asked Questions
What is a normal HCG level at 5 weeks pregnant?
At 5 weeks pregnant, HCG levels typically range from 18 to 7,340 mIU/mL, with an average around 1,000-2,000 mIU/mL. However, what's most important is the doubling rate rather than the absolute number.
Can HCG levels predict twins?
Higher than average HCG levels can sometimes indicate a multiple pregnancy, but this is not definitive. Some singleton pregnancies have high HCG, while some twin pregnancies have levels within the normal range. Ultrasound confirmation is needed.
When do HCG levels stop doubling?
HCG levels typically stop doubling every 48-72 hours around 6-7 weeks of pregnancy. After this point, the rate of increase slows, and levels eventually plateau and begin to decline around weeks 10-12.
What if my HCG level is not doubling?
If your HCG is not doubling appropriately in early pregnancy, it's important to consult your healthcare provider. While it can indicate potential problems, sometimes pregnancies with slow-rising HCG still progress normally.
How accurate are home pregnancy tests for measuring HCG?
Home pregnancy tests detect the presence of HCG but don't measure the exact amount. They typically become positive when HCG reaches 20-25 mIU/mL. Quantitative blood tests are needed for precise HCG measurement.
Can medications affect HCG levels?
Most medications don't affect HCG levels, but fertility treatments containing HCG can cause elevated readings. Always inform your healthcare provider about any medications you're taking when interpreting HCG results.
Should I be concerned if my HCG is at the low end of normal?
Being at the low end of the normal range isn't necessarily concerning if your levels are rising appropriately. The trend is more important than a single measurement. Always discuss concerns with your healthcare provider.
Disclaimer: This HCG calculator is for educational purposes only and is not a substitute for professional medical advice. HCG levels vary widely between individuals and pregnancies. Always consult with a qualified healthcare provider for interpretation of your lab results and pregnancy care. The information provided here is based on typical ranges but may not apply to every individual situation.
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