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Hcg Level Chart By Week

Hcg Level Chart By Week

What is HCG hormone and what does it do?

HCG also called, Human Chorionic Gonadotrophin or the pregnancy hormone is generated during the process of pregnancy and helps in supporting the natural growth and maturity of an egg in the ovary of the woman and even accelerates the releasing of the egg during the process of ovulation.

Guideline To HCG Levels During Pregnancy

hCG levels in weeks from LMP (gestational age)* :

  • 3 weeks LMP: 5 – 50 mIU/mL
  • 4 weeks LMP: 5 – 426 mIU/mL
  • 5 weeks LMP: 18 – 7,340 mIU/mL
  • 6 weeks LMP: 1,080 – 56,500 mIU/mL
  • 7 – 8 weeks LMP: 7, 650 – 229,000 mIU/mL
  • 9 – 12 weeks LMP: 25,700 – 288,000 mIU/mL
  • 13 – 16 weeks LMP: 13,300 – 254,000 mIU/mL
  • 17 – 24 weeks LMP: 4,060 – 165,400 mIU/mL
  • 25 – 40 weeks LMP: 3,640 – 117,000 mIU/mL
  • Non-pregnant females: 0 – 5 mIU/mL
  • Postmenopausal females: 0 – 8 mIU/mL

Level of HCG in early pregnancy

HCG, also referred as the human chorionic gonadotropin, is basically a hormone that is spotted in the mother’s blood or urine when she becomes pregnant much before she misses the period cycle. This is the hormone which helps in detecting pregnancy along with other factors.

HCG is at first detected in the blood sample in the initial 7-8 days right after ovulation with the help of delicate examinations. In reality the blood level in the pregnancy tests are positive about (> 2mIU/ml) by the 10th-11th days.

In about 85% of the normal pregnancy situations, the HCG level will double up after every 72 hours.

HCG levels will be at the peak around 8-10 weeks during pregnancy after which it would drop and continue at low levels for the remaining months of pregnancy.

Role Of HCG Level In Twin Pregnancy

The body does not produce HCG; rather, it comes purely from the developing baby. Each developing baby secretes a normal amount of HCG, which is double the normal amount in cases of twins compared to single pregnancy. These hormones work collectively to thicken the lining of the uterus, which supports the baby during pregnancy.

Progesterone is a hormone that stimulates the uterus to prepare for pregnancy. It is produced by the corpus luteum (an endocrine gland within the ovary). The purpose of HCG is to keep progesterone levels in balance until the placenta is developed enough to produce its own progesterone.

When expecting a twin, the HCG level increases dramatically during the first three months of pregnancy compared to single pregnancy, making it faster to detect HCG in blood and urine test. It doubles every 48 to 72 hours.

The negative side of high HCG levels for twins is that it can lead to more morning sickness during early pregnancy, which means more nausea and vomiting.

When is HCG produced?

HCG is produced in the placenta right after implantation. It can be detected in the blood or urine of the woman during early stages of pregnancy through HCG tests. Since the hormone level may fluctuate before periods, it is best to test after one misses their periods.

Sometimes, high levels of HCG, along with its symptoms, can also mean molar pregnancy where the placenta grows abnormally when the sperm and egg join during fertilisation. The sperm here fertilises with an empty egg leading to growth in placental parts, but no baby is formed. This is known as complete molar pregnancy. The other type is partial molar pregnancy, where the mass of the foetus contains both embryo and abnormal cells that can have severe birth defects. The healthy embryo, in this case, will end up being consumed by the abnormal mass.

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