hCG (human chorionic gonadotropin) is the hormone your body starts producing shortly after conception—it's what pregnancy tests check for.
Our hCG calculator helps you estimate how your hCG levels may rise over time, but remember, every pregnancy is different.
Healthy hCG levels often double every 48–72 hours, especially in early pregnancy. Our hCG doubling time calculator is a helpful tool for spotting patterns.
While a beta hCG calculator or hCG increase calculator can support your curiosity, only your doctor can confirm progress with bloodwork.
Whether you're tracking a singleton or curious about hCG levels for twins, Lunara empowers you with insights, without collecting or storing your data.
Wondering when the pregnancy hormone hCG starts to appear? After fertilization, the egg travels down to your uterus and implants into the uterine lining—this is when hCG production begins. Typically, implantation happens 6–10 days after conception.
According to experts, hCG can be detected in blood about 10 days after conception, and in urine around 14 days post-conception. But hCG levels start low and gradually rise. That’s why the best time to take a pregnancy test is after you've missed your period—for more accurate results.
If you're curious about your levels, Lunara’s online hCG calculator helps you calculate your hCG levels and understand your progress. Whether you’re early in pregnancy or monitoring changes, our hCG doubling time calculator and beta hCG levels calculator offer helpful insights—though they’re not a substitute for medical guidance.
Keep in mind: hCG levels typically double every 48–72 hours in early pregnancy, peaking around 8–10 weeks. After that, they begin to level off as the placenta takes over hormone production.
Low hCG doesn’t always mean there’s a problem. Your dates might be off, especially if you ovulated later than expected. Still, if your doctor checks your levels and they’re not rising as expected, a follow-up test may be recommended.
Lunara offers a calculator for hCG increases, including tools like the hCG level increase calculator, hCG calculator for twins, and even an hCG gender calculator—all created for informational use.
Every pregnancy is unique. Use our hCG calculators for guidance, but always follow up with your doctor if you experience pain, bleeding, or other concerning symptoms.