Pass the MRCOG Part 1 exam 1st time
Our Part 1 MRCOG resource covers all aspects of the curriculum, enabling you to revise questions that accurately reflect what you will face on exam day.
Choose how you want to revise
Revise with my preferences. Choose your difficulty or recap questions you've found hard.
Test myself against recent exam themes and ones curated by BMJ’s editorial team of doctors.
Play under a username and join friends or others for 10 questions. Move up of the daily leaderboard.
On the go
Download the app for offline access. Make revision easily fit into your schedule.
Select the best subscription for your exam date
Join 200,000+ OnExamination users who have successfully become medical professionals
July 2022 Exam
Revise with quality questions and detailed explanations
A 36-year-old woman is found to be rhesus status negative and has recently delivered. She has a Kleihauer test performed.
What is the principle of Kleihauer test?
HbF is more resistant to acid than maternal red cells
Hbf has higher affinity for oxygen than maternal haemoglobin
HbF is resistant to cold
Hb F is larger in quantity
Maternal haemoglobin is more resistant to acid than Hb F
Key Learning Point
Rhesus negative mothers are offered anti D immunoglobulins to prevent complications in subsequent pregnancies.
This test is to confirm transplacental blood loss. The test is performed on the mother's blood.
HbF more resistant to acid elution than the maternal cells. The fetal cells, therefore, stain red, maternal cells stain pink staining.
Fetal red cells contain HbF and are therefore more resistant to acid elution than the maternal cells. The fetal cells therefore stain red, maternal cells stain pink.
Excellent for preparation