As you probably know, the doubling time of beta-hCG values is very important parameter to monitor how your pregnancy develops. Measuring the concentration of beta hCG in blood, measured functionality and placental trophoblast.The hCG levels increase as this tissue develops and if no proper development of the placenta, beta hCG levels will not grow or the velocity of growth will be lower than expected. The growth rate of hCG is measured with the doubling time, which is the time that the concentration of beta hCG takes to double in your blood.
It is believed that the doubling time of hCG beta must be 2 days or 48 hours. However, this is not entirely true. The first days of pregnancy doubling time is usually much lower, between 20 and 30 hours. Then, as the days go by, normal doubling time becomes up to 200 hours.
We have developed this calculator to calculate the doubling time of the beta-hCG:
If you have your value duplication and want to know if it is a normal value, you should consult the betabase.info data base:
It is believed that the doubling time of hCG beta must be 2 days or 48 hours. However, this is not entirely true. The first days of pregnancy doubling time is usually much lower, between 20 and 30 hours. Then, as the days go by, normal doubling time becomes up to 200 hours.
How to calculate the beta hCG doubling time ?
We have developed this calculator to calculate the doubling time of the beta-hCG:
- First hCG level
- Second hCG level
- Days Between test: days between the two tests
Just enter these 3 details and the calculator will calculate your doubling time in hours.
How to know if the value of your beta hCG doubling time is normal?
If you have your value duplication and want to know if it is a normal value, you should consult the betabase.info data base:
| Range Beta-hCG (mIU / ml) | Median doubling time (hours) | Doubling time faster (hours) | Doubling time slower (hours) | Number of women indicating a doubling time for this range of beta-hCG |
|---|---|---|---|---|
| 1 - 2 | 15.50 | 7.22 | 18.57 | 3 |
| 2 - 4 | 21.11 | 7.22 | 65.13 | 14 |
| 4 - 8 | 24.88 | 7.22 | 65.13 | 53 |
| 8 - 16 | 27.49 | 7.22 | 149.10 | 207 |
| 16 - 32 | 31.81 | 8.10 | 174.14 | 627 |
| 32-64 | 35.70 | 8.10 | 665.28 | 1608 |
| 64-128 | 37.25 | 14.61 | 359.86 | 3210 |
| 128-256 | 38.28 | 14.61 | 696.18 | 4827 |
| 256-512 | 39.34 | 12.46 | 245.62 | 5507 |
| 512 - 1024 | 40.47 | 12.46 | 247.76 | 5265 |
| 1024 - 2048 | 42.31 | 12.46 | 413.63 | 4255 |
| 2048 - 4096 | 45.30 | 12.46 | 709.35 | 3279 |
| 4096 - 8192 | 50.03 | 15.64 | 846.62 | 2278 |
| 8192-16384 | 60.38 | 17.66 | 373.89 | 1480 |
| 16.384 a 32.768 | 73.31 | 20.90 | 4.695,28 | 887 |
| 32768-65536 | 96.41 | 20.90 | 1.220,17 | 444 |
| 65536-131072 | 135.51 | 20.90 | 1.658,40 | 187 |
| 131072 a 262144 | 187.67 | 20.90 | 1.658,40 | 28 |
| 262.144-524.288 | 189.93 | 28.93 | 263.56 | 3 |
In each line, youcan shown minimum, median and maximum values of doubling time for a given range of concentrations of the hormone. For example, if the two beta hCG values you entered in the calculator are 80 mIU / ml and 110 mIU / ml, doubling your time should be around 37.35 hours and not exceed 360 hours. If your doubling time value is below this maximum, everything is ok.