What Causes Low hCG Levels in Early Pregnancy?

What is hCG?

The hormone hCG (expanded as Human Chorionic Gonadotropin) is produced in the early weeks of a pregnancy by the trophoblast cells (the tissue that later forms the placenta). This hormone maintains a viable pregnancy during the early weeks. It also helps produce progesterone (a hormone necessary for sustaining pregnancy). It is used to verify pregnancy with either a blood test or a urine test. In most normal pregnancies, levels of hCG will steadily increase during the first trimester of pregnancy.

What are the Causes of Low hCG Levels in Early Pregnancy?

• One of the most frequent causes for a low level of hCG is that a woman became pregnant later than she might have thought. Perhaps ovulation happened later than a woman expected, or implantation occurred several days after a woman’s estimated ovulation date. In cases like these, repeat blood tests will show a normal rise in hCG levels.
• A woman’s estimate of her pregnancy is often based on her last menstrual period. A later ovulation date can mean a younger pregnancy and, as a result, lower hCG levels in the bloodstream. Low or decreasing levels of hCG can indicate that she has experienced a loss of pregnancy, or may be occurring, but only a low amount of hCG by itself doesn’t confirm that.
• An ectopic pregnancy specifically happens when the fertilised egg is planted outside the uterus, usually in the fallopian tube. Typically, with an ectopic pregnancy, hCG levels increase at a slower rate than expected. It is a medical emergency and requires immediate medical attention.
• A blighted ovum is a condition in a fertilised egg that gets implanted in the uterus, but does not develop into an embryo. The gestational sac will form, but hCG levels will not continue to rise normally.
• Early problems in placental development may produce insufficient hCG. Since hCG is produced by the placenta, hCG levels will differ if the placenta has developed and is functioning incorrectly.
• A woman could have some underlying medical issues that cause hormone levels not to rise, and prevent her from carrying a pregnancy to term.

Treating Low hCG Levels

Many factors can contribute to low hCG levels; therefore, treatment options vary depending on the underlying cause. In many cases of normal first-trimester pregnancies, no immediate treatment is needed. Your doctor may choose to monitor hCG levels or repeat ultrasound imaging.

Women who have had a miscarriage can be asked to wait for their body to pass the tissue naturally. In some cases, in the event of an ectopic pregnancy, your doctor can advise about ectopic pregnancy treatments depending on how advanced and serious the condition is. In some women who may already suffer from health conditions, such as diabetes, thyroid disease, etc., addressing those issues may well provide effective assistance.

Conclusion

Low hCG levels in early pregnancy may be a reflection of various reasons such as early pregnancy, incorrect dating of the pregnancy, miscarriage, ectopic pregnancy, or other potential pregnancy conditions. Low hCG levels can indicate a problem, but may not necessarily mean that a pregnancy will not continue. The critical component in the hCG process is how they develop over time. The physician may order repeat hCG levels and an ultrasound to determine if the results warrant further investigation. If you experience vaginal bleeding, severe abdominal pain, or other concerning symptoms such as shoulder pain, fainting or feeling dizzy, fever or chills, seek medical attention immediately.