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Low Platelets in Pregnancy: A Clinical Reality Check from Abdul Mannan
Dec 9, 2025, 03:39

Low Platelets in Pregnancy: A Clinical Reality Check from Abdul Mannan

Abdul Mannan, Consultant Haematologist at Betsi Cadwaladr University Health Board, shared on LinkedIn:

”Low Platelets in Pregnancy: A Clinical Reality Check

Every haematologist gets these calls.

An obstetrician finds a low platelet count at booking bloods.

Panic sets in. But here’s the thing most clinicians forget:

  • 75% of cases are completely benign.
  • Gestational thrombocytopenia is the most common cause. It doesn’t harm mum. It doesn’t harm baby. It just… exists.
    But that doesn’t mean we can be complacent. The remaining 25% includes conditions that can kill: pre-eclampsia, TTP, HELLP syndrome, acute leukaemia.

So how do we tell the difference?

Blood Doctor 5-Step Approach:

  1. Rule out emergencies first. Pre-eclampsia. TTP. Leukaemia. These can’t wait.
  2. Look at the blood film. Schistocytes point to microangiopathy. Blasts mean something sinister. Platelet clumping? That’s just pseudothrombocytopenia.
  3. Consider severity and timing. Platelets below 20 × 10⁹/L or dropping early in pregnancy? That’s not gestational thrombocytopenia. Think ITP.
  4. Assess bleeding risk. Is she symptomatic? Any procedures coming up? This guides urgency.
  5. Watch the response to treatment. If platelets rise with steroids or IVIG, you’ve likely got ITP.

Practical targets for delivery:

  • Vaginal delivery: >20 × 10⁹/L
  • C-section: >50 × 10⁹/L
  • Epidural: >70 × 10⁹/L

And don’t forget the baby. Around 30% of infants born to mothers with ITP will have low platelets themselves.

Always check that cord blood count.

The good news? First-line treatments (prednisolone and IVIG) are safe in pregnancy.

What’s your approach when you get that Friday afternoon call about low platelets in a pregnant patient?”

Low Platelets in Pregnancy: A Clinical Reality Check from Abdul Mannan

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