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Sinusoidal pattern — recognise immediately

G3P2, 33 years old34+1 weeksReduced fetal movements 24 h, mild PV bleed

Rh-negative mother. Reports a brownish loss yesterday. Pale on examination.

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Clinical picture

Reduced movements + bleed + pallor + Rh-negative — think fetal anaemia (FMH, Rh isoimmunisation). The CTG can be diagnostic.