How can my blood group have changed from one pregnancy to the next?

[GinGirl]

I really don't think that this is just me being dense, but I want to check before I going chasing my midwife for answers.

I was tested as Rh Neg with both my first pregnancies. At all times. So that is 4 tests that say I'm Rh Neg.

Today I had a phone call from my surgery telling me that my 12 week bloods are back and they are calling (msg from a GP, not mine) just to inform me that I'm Rh Pos...

What are the chances, and how the heck would that even happen?

xx

I would call them back and get them to double check the results (as they lost mine a record 3 times the last time I was pregnant! sorry Boris we need to stab you yet again as we've lost your records)

they have made a mistake

All I know is that I randomly developed some anti-M antibodies between my two pregnancies so something can obviously happen!!

Thank you! I thought it was a bit weird. Am now worrying that there is a Rh Pos lady out there who doesn't know and should!

My original msg should have read first and second pregnancies obviously.

Oh bethylou am concerned now. Guess I'll just have to wait for the re-test at 28 weeks. I don't want to be Rh Pos though... I was quite happy being Rh Neg!

either they were worng the first tow pg or they are wrong now....?

Not a likely thing, they have made a mistake It has happened very rarely in people who have had liver transplants or bone marrow transplant . Chase up your midwife as you are RH Neg which can be problematic.

They have made a mistake I would think.

I looked at my sheet after the birth of my DS2 which

a - said my labour was 45 minutes (you fucking bastards refused to come and examine me because I was "not in labour" until the morning shift came on, examined me and ran me in a wheelchair to the delivery suit)

b - Blood group was O Pos. I said "oh - you have his blood group already?"
"no dear that's yours"
"No dear I am A pos - just as well I didn't need any eh?"

To add insult to injury I used to work for the National Blood Service (thankfully in Communications not with the red stuff) so you'd think I would know about some of this stuff!

Norma I do know though that everyone can receive Group O. So whilst not ideal that they had you down as wrong group, you wouldn't have died as a result. (Just in case that is reassuring!) Now what you mean about timings, with DD1 they had the whole labour down as 13 hours... not the 27 I made it!

You can be re graded as a diferent group. A haematologist told me how and why once but I stopped listening 30seconds in as I stopped understanding 15 seconds in.

It is something you should question. It may be that you have the wrong result, in which case someone may have yours. It needs sorting. It may that someone has a similar name to you, or that they rang the wrong person, the bottle was mislabelled. All sorts of human error in the long chain.

Ring and be retested. Absolutely.

It sounds a bit weird. It doesnt make sense that they would phone you just to let you know that you were rh +ve, what would be the need to call you?

I googled and there was evidence of terrodelivery and i got 4 seconds in read the pdf and diddn't get it

Ring and check

In terms of safety, it is possible that anti-D would be issued to an individual on the back of the sample held by blood bank. Which is why I would urge you to chase this, in case someone out there is being told they are rhesus neg when they are pos. They may recieve anti-D at 28 weeks. Which they don't need.

It is impossible that blood would be given on the back of a held result, it is individually cross matched per episode, so issued 'personally'. Hence it costs something daft like £400 per unit. Where this is not possible due to time, a plasma expander would be used or neg if needs be.