Paying attention to positive results on lab reports can often prevent certain diseases from harming the fetus. Follow your doctor's instructions carefully, as most conditions during pregnancy are relatively easy to manage. Below, we'll explore what common "+" signs mean in prenatal lab results, helping you approach each prenatal checkup with greater ease and confidence.
Common "Positive" Test Results in Prenatal Care
1. Urine Pregnancy Test (HPG)
The "positive" result in a urine pregnancy test is likely the first positive indicator an expectant mother encounters. After conception, the body produces a hormone called human chorionic gonadotropin (hCG), which helps maintain pregnancy. This hormone can typically be detected in a woman's urine around 10 days after conception.Detection of this hormone in urine is termed a positive test (), confirming pregnancy!
2. Urine Protein Test (Proteinuria)
Healthy individuals have only trace amounts of protein in urine, undetectable by routine qualitative tests. A positive result using standard qualitative methods indicates proteinuria.Proteinuria occurs more frequently during pregnancy and may be influenced by vaginal discharge contamination. Generally, this is not a major concern and can be managed with regular follow-up tests. However, if multiple "+" signs appear and subsequent tests still show "+" signs, it may indicate primary or secondary disease. Expectant mothers are advised to consult their doctor.
3. Urine Ketone Test (Ketones)
Ketones encompass acetoacetic acid, β-hydroxybutyric acid, and acetone. These are intermediate products of fat metabolism. Healthy individuals have extremely low ketone levels in urine, yielding negative qualitative results.However, severe morning sickness preventing food intake can disrupt glucose metabolism and increase fat breakdown, leading to ketonemia and subsequently ketonuria. The presence and quantity of ketones in urine indicate the extent of fat consumption due to vomiting and inability to eat, reflecting the severity of the condition and aiding timely medical intervention.
4. Urine Glucose Test (Glucose)
Healthy individuals have only trace amounts of glucose in their urine (physiological urinary glucose), and routine qualitative urine glucose tests are negative.Excessive glucose excretion in urine primarily results from elevated blood glucose levels in the expectant mother and reduced renal tubular reabsorption capacity. Gestational diabetes is a condition that can harm both the mother and fetus. The level of glucose in urine reflects the mother's renal tubular glucose reabsorption capacity and the severity of the disease.
5. Hepatitis B Serology Test (HBsAg/HBcAg)
Hepatitis B virus (HBV) infection is currently recognized as the most severe form of viral hepatitis affecting humans. Asymptomatic carriers with positive HBsAg in their blood are the primary source of HBV transmission. Pregnant women carrying HBV can directly transmit the virus to their fetus through vertical mother-to-child transmission during pregnancy.This poses serious risks to the baby's safety in utero and throughout life. Therefore, expectant mothers and their families should take this matter very seriously.
6. Alpha-Fetoprotein (AFP) ()
Alpha-fetoprotein is a specific glycoprotein produced by fetal liver cells. It is a normal component of fetal serum. Measuring AFP levels in maternal serum and amniotic fluid aids in monitoring fetal development and detecting fetal abnormalities early.Measuring AFP levels in amniotic fluid also aids in prenatal diagnosis of certain congenital disorders. 7. HIV Screening (HIV) HIV screening tests for infection with the human immunodeficiency virus (HIV), commonly known as AIDS. This disease spreads rapidly, with extremely high mortality rates for both expectant mothers and infants. Currently, there are no safe and effective treatments or vaccines available.
8. (RPR) Screening ( )
Syphilis is a sexually transmitted disease caused by Treponema pallidum (TP), also known as the syphilis spirochete. An infected expectant mother can transmit the disease to the fetus through the placenta. Early infection may cause miscarriage or premature birth, while late-stage infection in a viable fetus can result in congenital syphilis.The RPR test is a simple screening method used to detect syphilis in expectant mothers. However, a positive result only indicates the presence of anti-TP antibodies in the tested sample and does not provide absolute proof of infection with Treponema pallidum. Further testing is required for confirmation.
What are the benefits of prenatal checkups?
1. Receive scientific guidance from doctors: Women can obtain scientific knowledge about pregnancy nutrition and hygiene during prenatal visits.
2. Predict potential delivery complications: Examinations help understand fetal position and development, enabling preparation for delivery and ensuring a safe birth.
3. Early disease detection: Prenatal checkups enable timely identification of maternal health issues or factors unsuitable for continuing pregnancy, allowing prompt intervention or termination if necessary.
5. Early Detection of Pregnancy Complications: Prenatal checkups can identify complications like placenta previa or placental abruption, which threaten both fetal and maternal lives. Prompt intervention is essential to prevent severe outcomes.