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Placental Insufficiency – Causes, Symptoms & Treatment

Placental insufficiency is a condition in which the placenta cannot adequately supply the unborn baby with oxygen and nutrients, potentially causing serious pregnancy complications.

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Things worth knowing about "Placental Insufficiency"

Placental insufficiency is a condition in which the placenta cannot adequately supply the unborn baby with oxygen and nutrients, potentially causing serious pregnancy complications.

What Is Placental Insufficiency?

Placental insufficiency is a condition in which the placenta -- the organ connecting mother and baby -- fails to function adequately. The placenta is responsible for the exchange of oxygen, nutrients, and waste products between mother and child. When its function is impaired, the unborn baby may not receive sufficient oxygen or nutrients, which can lead to serious complications during pregnancy.

A distinction is made between acute placental insufficiency, which develops suddenly, and chronic placental insufficiency, which develops gradually over weeks.

Causes

Placental insufficiency most commonly results from conditions that affect blood flow to the placenta:

High blood pressure during pregnancy (gestational hypertension) and preeclampsia
Pre-existing or gestational diabetes mellitus
Chronic kidney or heart disease in the mother
Autoimmune disorders (e.g., antiphospholipid syndrome)
Smoking, alcohol, or drug use during pregnancy
Multiple pregnancies (e.g., twins)
Chromosomal abnormalities in the baby
Infections during pregnancy
Thrombophilia (increased blood clotting tendency)

Symptoms

Placental insufficiency often causes no direct symptoms in the mother. Signs are mainly observed in the unborn baby:

Intrauterine growth restriction (IUGR): The baby grows more slowly than expected and is small for gestational age.
Reduced fetal movements felt by the mother
Low levels of amniotic fluid (oligohydramnios)
Abnormal fetal heart rate patterns on cardiotocography (CTG)
In severe cases: risk to the life of the unborn baby, including intrauterine fetal death

Diagnosis

Diagnosis is typically made during routine prenatal care through several examinations:

Ultrasound: Measurement of fetal growth and amniotic fluid volume
Doppler ultrasound: Assessment of blood flow in the umbilical artery, uterine arteries, and fetal brain vessels
Cardiotocography (CTG): Monitoring of fetal heart rate and activity
Laboratory tests: including blood pressure measurement, urine protein levels, and biomarkers such as PlGF (placental growth factor)

Treatment

There is currently no direct treatment to restore placental function. Management focuses on close monitoring of the baby and optimizing the health of the mother:

Conservative Measures

Frequent follow-up with ultrasound and Doppler examinations
Blood pressure management in cases of hypertension
Optimal control of diabetes mellitus
Low-dose aspirin (acetylsalicylic acid) for prevention in high-risk pregnancies
Physical rest and stress reduction
Immediate cessation of smoking, alcohol, and drug use

Delivery

In severe cases, early delivery may be necessary to protect the baby. The decision on the optimal timing of delivery is made on an individual basis, taking into account gestational age, severity of placental insufficiency, and the condition of the baby. Corticosteroids are often administered before preterm delivery to promote fetal lung maturity.

Prognosis

The prognosis depends strongly on the severity of the condition and the timing of diagnosis. With timely detection and close monitoring, many complications can be prevented or minimized. Babies born with a low birth weight due to placental insufficiency may have an increased risk of metabolic conditions later in life.

References

Deutsche Gesellschaft für Gynäkologie und Geburtshilfe (DGGG): Guideline on Intrauterine Growth Restriction, AWMF Register No. 015-080 (2016, updated).
Figueras F, Gratacos E. Update on the diagnosis and classification of fetal growth restriction and proposal of a stage-based management protocol. Fetal Diagn Ther. 2014;36(2):86-98.
World Health Organization (WHO): WHO recommendations for care of the preterm or low-birth-weight infant. Geneva: WHO, 2022.

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