Fetal Complications
Problems affecting the developing baby during pregnancy
Quick Facts
- Type: Pregnancy complications affecting the fetus
- Examples: Growth restriction, fetal distress, birth defects
- Detected by: Ultrasound and fetal heart-rate monitoring
- Warning sign: Reduced or absent fetal movement
Overview
Fetal complications are problems that affect the developing baby during pregnancy. They cover a wide range of conditions, from slowed growth and reduced movement to abnormal heart rates, structural birth defects, and problems with the placenta or amniotic fluid that affect the baby's wellbeing.
Many of these problems are detected through routine prenatal care, including ultrasound scans and monitoring of the baby's heart rate and movements. Some fetal complications are linked to the parent's health, such as high blood pressure or diabetes, while others arise on their own. Early detection allows the care team to monitor closely, plan treatment, and choose the safest timing and method of delivery.
Symptoms
Many fetal complications cause no symptoms the parent can feel and are found only on testing. When there are warning signs, they may include:
- A noticeable decrease or absence of the baby's usual movements
- A measured uterus that is smaller or larger than expected for the dates
- Vaginal bleeding or leaking of fluid
- Severe abdominal or back pain
- Signs of the parent's own pregnancy complication, such as severe headache or swelling from preeclampsia
A clear reduction in or absence of fetal movement should prompt urgent contact with a midwife or doctor the same day. Heavy bleeding or severe abdominal pain is an emergency.
Causes
Fetal complications have many possible causes, often acting together.
- Placental problems: A poorly functioning or low-lying placenta can limit oxygen and nutrients.
- Parental health conditions: High blood pressure, preeclampsia, diabetes, infections, or heart disease.
- Genetic and chromosomal conditions: Which can cause birth defects or growth problems.
- Amniotic fluid problems: Too little or too much fluid.
- Multiple pregnancy: Twins or more carry higher risk.
- Smoking, alcohol, or certain medications during pregnancy.
Risk Factors
- High blood pressure, preeclampsia, or diabetes in the parent
- Heart, kidney, or autoimmune disease in the parent
- Smoking, alcohol, or substance use during pregnancy
- Older maternal age or carrying twins or more
- Previous pregnancy with a fetal complication
- Certain infections during pregnancy
Diagnosis
Prenatal care is built around detecting fetal problems early. Common tests include:
- Ultrasound: To check the baby's growth, anatomy, fluid level, and the placenta.
- Fetal heart-rate monitoring: Such as a non-stress test, to assess the baby's wellbeing.
- Doppler studies: To measure blood flow through the umbilical cord and placenta.
- Blood and screening tests: For genetic conditions, infections, and parental health.
- Amniocentesis or other testing, when more detailed genetic information is needed.
Treatment
Treatment depends on the specific complication, how far along the pregnancy is, and the wellbeing of both parent and baby.
- Closer monitoring: More frequent scans and heart-rate checks to track the baby.
- Treating the underlying cause: Such as controlling the parent's blood pressure or blood sugar.
- Medications: For example, steroids given to the parent to help the baby's lungs mature if early delivery is likely.
- Timing of delivery: Planning early or induced delivery, or cesarean birth, when continuing the pregnancy poses more risk than delivery.
- Specialist and newborn care: Including neonatal intensive care for babies born early or unwell, and specialist surgery for some birth defects after birth.
Prevention
Not all fetal complications can be prevented, but risk can be reduced:
- Attend all prenatal appointments so problems are found early
- Manage existing conditions such as diabetes and high blood pressure before and during pregnancy
- Take recommended prenatal vitamins, including folic acid before and in early pregnancy
- Avoid smoking, alcohol, and unsafe medications
- Report reduced fetal movement or other warning signs promptly
When to See a Doctor
Contact your midwife or doctor the same day if you notice your baby moving less than usual or not at all. Seek emergency care immediately for:
- Heavy vaginal bleeding
- Severe or constant abdominal pain
- A sudden gush or steady leaking of fluid before term
- Severe headache, vision changes, or sudden swelling, which can signal preeclampsia
Frequently Asked Questions
What does reduced fetal movement mean?
A clear decrease in or absence of your baby's usual movements can be a sign that the baby is unwell and should be checked the same day. Contact your midwife or doctor promptly rather than waiting; it is always appropriate to have it assessed.
How are fetal complications detected?
Most are found through routine prenatal care, including ultrasound scans, fetal heart-rate monitoring, and blood-flow (Doppler) studies. Screening blood tests and, when needed, more detailed genetic testing also help.
Can fetal complications be treated before birth?
Some can be managed during pregnancy by treating the parent's condition, giving medications such as steroids to help the baby's lungs mature, or increasing monitoring. In other cases the best treatment is planning a safe, sometimes early, delivery.
What raises the risk of fetal complications?
Risk is higher with parental high blood pressure, preeclampsia, diabetes, smoking, alcohol use, older age, twins or more, and certain infections. Good prenatal care helps detect and manage these risks.
When should I seek emergency care?
Get urgent help for heavy vaginal bleeding, severe abdominal pain, a sudden gush or leaking of fluid before term, or signs of preeclampsia such as severe headache, vision changes, or sudden swelling.
References
- MedlinePlus, U.S. National Library of Medicine. Health Problems in Pregnancy.
- American College of Obstetricians and Gynecologists (ACOG). Special Tests for Monitoring Fetal Health.
- Mayo Clinic. Fetal ultrasound.
- Centers for Disease Control and Prevention (CDC). Birth Defects.