In brief — the direct answer
Multifetal Pregnancy Reduction (MFPR) is a medical procedure offered to families with high-order multiple pregnancies (triplets, quadruplets, or more). While the idea of multiple babies is often a joy, carrying three or more fetuses carries extreme risks, including very early premature birth, cerebral palsy, and maternal complications like pre-eclampsia. By reducing the number of fetuses to two (twins) or one (singleton), we significantly increase the chances that the remaining babies will be born healthy and at a safe gestational age.
What is Multifetal Pregnancy Reduction?
The procedure is performed early in the pregnancy, typically between 11 and 13 weeks.
For pregnancies where each baby has its own placenta (dichorionic/trichorionic), the procedure involves a thin needle guided by ultrasound to deliver a small amount of medication (potassium chloride) to the heart of the selected fetus. The baby's heart stops quickly and painlessly. The remaining fetuses then continue to develop normally with significantly reduced risks of prematurity.
Who is at risk?
MFPR is considered for:
- Triplets or more: To reduce the risk of extreme prematurity (birth before 28 weeks).
- High-Risk Mothers: Women with a history of cervical weakness or prior premature births where a triplet pregnancy would be physically dangerous.
- Structural Anomalies: If one baby in a triplet set is found to have a severe defect, 'selective' reduction of that specific baby can be performed.
How we diagnose it
The decision-making process is supported by detailed counseling and imaging:
- High-Resolution Scan: Checking each baby's anatomy and Nuchal Translucency to ensure the healthiest babies are chosen to remain.
- Ethical Support: Providing families with a neutral, compassionate space to discuss the medical, personal, and ethical aspects of the decision.
- Maternal Health Check: Ensuring the mother is physically ready for the procedure.
What does management involve?
The procedure is similar to a CVS or Amniocentesis:
- Precision: The surgeon identifies the baby most accessible and further away from the others.
- Speed: The actual reduction takes only a few minutes.
- Recovery: The mother rests in our clinic for an hour and is then monitored with a follow-up scan a few days later.
- The Future: The reduced fetus remains in the uterus and typically shrinks over time, having no impact on the birth of the healthy twins.
What are the outcomes?
The data shows a clear benefit for the remaining babies:
- Survival: Twins from a reduced triplet pregnancy have a much higher survival rate than triplets born at 26-28 weeks.
- Health: The risk of long-term disability like cerebral palsy is significantly lower after reduction.
- Maternal Safety: The risk of gestational diabetes and severe high blood pressure is also reduced.
When to see a subspecialist
Deciding on MFPR is one of the most difficult decisions a family can face. It requires expert clinical guidance and the highest levels of technical skill.
At the MFM Unit, Dr. Leanne Bricker leads our multiple pregnancy service. We provide the compassionate counseling and the precise surgical care needed to ensure that your path forward is as safe and healthy as possible for both you and your babies.
Questions to ask your doctor
References & Clinical Guidelines
- Multifetal Pregnancy Reduction (Committee Opinion 719)
- Multifetal Gestations: Twin, Triplet, and Higher-Order Multifetal Pregnancies (Practice Bulletin 231)
- ISUOG Practice Guidelines: role of ultrasound in twin pregnancy