Antenatal & maternal medicineFree in the app
Twin complications
TTTS, growth discordance and one twin dying.
Source: RCOG GTG 51 · NICE NG137Scans
| Monochorionic | Every 2 weeks from 16 weeks. |
|---|---|
| Dichorionic | Every 4 weeks from 20 weeks. |
TTTS — Quintero stages
| I | Deepest pool 8 cm or more in recipient, 2 cm or less in donor. |
|---|---|
| II | Donor bladder not seen. |
| III | Critical Dopplers. |
| IV | Hydrops. |
| V | Death of one or both. |
- Laser ablation for stage II or more at 16–26 weeks.
- Selective growth restriction: weight difference 25% or more and/or one twin below 10th centile.
- One twin dies (MC): about 15% risk co-twin dies, 26% brain injury. Do not deliver immediately; brain MRI 4–6 weeks later.
A summary for trained clinicians. Always check the full guideline, the patient in front of you and your hospital's protocol. Spotted an error? Tell us.