Senior Consultant, Fetal Medicine, Artemis Hospitals, Gurgaon, India
Part 7 of 7 in Diagnostic Utility of First Trimester Ultrasound
The Inverted Pyramid of Care: Rethinking When Pregnant Women Should Be Seen
June 21, 2026
Pregnancy follow-up traditionally involved one early visit around 12 weeks, with visit frequency increasing as term approached. Sixteen years ago, the Fetal Medicine Foundation proposed the opposite: screen comprehensively for structural abnormalities, chromosomal risk, preeclampsia and preterm labour risk at the 12-week visit, follow with an anomaly scan at 20 weeks, and deliver at 37-41 weeks, known as the 'inverted pyramid of care,' where maximum screening happens at the first visit and the number of subsequent visits can decrease if that first scan is done properly.
Understood this way, the 12-week scan is a one-stop risk assessment: accurate dating, anomaly screening, preeclampsia and preterm labour risk, twin chorionicity, and combined aneuploidy screening, all in a single visit. Dr. Sablok's take-home message to the doctors on the call was direct: make the most of the 12-week window, since early prediction enables risk stratification, timely referral to a fetal medicine specialist, and time for early intervention.
This guide is based on a live Jivo Masterclass — Dr. Aanchal Sablok taught doctors across Africa on June 21, 2026.
FROM THE LIVE Q&A
How does the stage of CKD (chronic kidney disease) affect the risk of preeclampsia?
Dr. Aanchal Sablok
If the mother already has chronic kidney disease, she is already at risk of chronic hypertension. When placental implantation occurs on top of this background, the relevant terminology is preeclampsia superimposed on chronic hypertension. This represents an even higher risk of developing preeclampsia, particularly in the presence of chronic renal disease, chronic hypertension, or other conditions such as autoimmune disease. The risk of fetal growth restriction (small for gestational age) is also correspondingly higher in this group.
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Frequently Asked Questions
What is the inverted pyramid of care model?▼
Proposed by the Fetal Medicine Foundation, it screens comprehensively for structural abnormalities, chromosomal risk, preeclampsia and preterm labour risk at the 12-week visit, follows with an anomaly scan at 20 weeks, and targets delivery at 37 to 41 weeks, concentrating maximum screening at the first visit rather than the last.
How does this differ from the traditional pattern of antenatal visits?▼
Pregnancy follow-up traditionally involved one early visit around 12 weeks, with visit frequency increasing as term approached. The inverted pyramid reverses that emphasis, front-loading the most intensive screening to the earliest visit.
What does the 12-week visit accomplish under this model?▼
It functions as a one-stop risk assessment: accurate dating, anomaly screening, preeclampsia and preterm labour risk, twin chorionicity, and combined aneuploidy screening, all in a single visit.
Why can front-loading screening reduce the total number of antenatal visits needed?▼
Because the number of subsequent visits can decrease if the first scan is done properly. Early prediction enables risk stratification, timely referral to a fetal medicine specialist, and time for early intervention.
In This Series: Diagnostic Utility of First Trimester Ultrasound
- 1.Diagnostic Utility of First Trimester Ultrasound
- 2.Screening for Down Syndrome: How Detection Rates Evolved From 30% to 96%
- 3.Nuchal Translucency: Why a High Reading Doesn't Mean What Patients Fear
- 4.Structural Abnormalities the First-Trimester Scan Can Already Catch
- 5.Preeclampsia Screening: Uterine Artery Doppler, PLGF, and the New Role of the Ophthalmic Artery
- 6.Predicting Preterm Labour: Why Cervical Length Should Be Measured at 12 Weeks
- 7.The Inverted Pyramid of Care: Rethinking When Pregnant Women Should Be Seen