HCG Levels for Twins

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The HCG hormone or the Human Chorionic Gonadotropin is produced when you conceive. It is found in your blood levels, within 8 days of your conception. This hormone is produced when your fertilized egg is implanted on your uterine wall.

The level of HCG in your body keeps increasing and gets doubled up after an interval of 48 to 72 hours of early pregnancy. Urine and blood tests done during your pregnancy, confirm the levels of your HCG.

Change in Levels of HCG

The level of HCG in your body keeps increasing and gets doubled up after an interval of 48 to 72 hours of early pregnancy. Urine and blood tests done during your pregnancy, confirm the levels of your HCG.

HCG level is measured in mIU/ml or milli-international units per milliliter. Usually, the HCG level at four weeks of your pregnancy ranges between 426 and 5 mIU/ml. However, this indicated level of HCG can be higher if you are pregnant with twins. There is a huge variation in HCG level between a single and twin pregnancy and a great difference exists between the two of them.

Your doctor might ask you to have two blood tests within three days to monitor your beta HCG levels and they check whether it is increasing. The change in the levels will provide the information about your conception.

Your progesterone levels are also triggered due to HCG. Progesterone is a critical hormone required for pregnancy, which maintains the lining of your uterus and stops menstruation. If your HCG levels become high, you will have more nausea feeling and vomiting. If the level is low, there would be fewer symptoms.

Chart of normal HCG level

The blood test for determining the HCG level uses 2 or 4 milliliter of venous blood. The normal HCG level is calculated from the LMP, which is the last menstrual period. Have a look at the chart given below to check the normal level of HCG during various stages of pregnancy.

  • Non-pregnant woman – HCG level is below 5 mIU/ml
  • 3 weeks of LMP – the level is 5 – 50 mIU/ml
  • 4 weeks of LMP – the level range between 5 – 426 mIU/ml
  • 5 weeks of LMP – it is 18 -7,340 mIU/ml
  • 6 weeks of LMP – it is 1080 – 56500 mIU/ml
  • 13 – 16 weeks of  LMP – 13,300 – 254,000 mIU/ml
  • 25 – 40 weeks of LMP – the level is 3,640 – 117, 000 mIU/ml

Twins HCG Level

The blood or the serum test would help you in confirming whether you are having twins or a single baby. The higher your HCG levels are in the report, the more chances are there that you are pregnant with twins. However, HCG levels are not just enough to be sure that you will have twins. Go for an ultrasound or a Doppler heartbeat check for multiple heartbeat sounds. These can confirm that you have twins. Doppler test is carried out in the 12th week of your pregnancy when two heartbeats can be identified.

There are certain misconceptions about low level HCG that it indicates problem in pregnancy. This is not true just as high level HCG does not necessarily mean that you will deliver a healthy baby. Still if the levels are low, it is always advisable to keep in touch with the doctor.

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