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Rh Neg- Still bleeding slightly (how long before I need to get another shot?)
Still bleeding and confused how long the initial shot last from first

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7 replies to this topic

#1 Lee1978

Posted 19 January 2013 - 07:18 PM

Hi Everyone, I initially had a clot light show last Tuesday (4 days ago) and received my anti D shot.I would just like to know if I am still bleeding ( very lightly) when do I need to get another shot? Thanks Lee.

#2 ~Jot~

Posted 19 January 2013 - 07:27 PM

From memory, the shot is effective for about 6-8 weeks I think. Last pregnancy I bled heavily for 7 weeks, I only had one anti D shot during that time.

#3 Sassy Dingo

Posted 19 January 2013 - 07:29 PM

I got my routine Anti D shot at 20 weeks.

Had a blood test last week at 35 weeks to see whether the first was still effective and I needed another. It was still working.

You'll be fine.

Hope the bleeding stops soon.

#4 deejie

Posted 19 January 2013 - 07:45 PM

Anti-D does not "last" for a set amount of time. The volume administered in 2nd/3rd trimester covers 6mL of fetal blood leaking in to your circulation.

When/if you require another shot depends very much on your gestation and the suspected cause of bleeding. If you are in second/third trimester, you would have had a kleihauer test done to calculate the volume of fetal blood present in your circulation (if any) and the dose would have been calculated accordingly. The half life of Anti-D is approximately 4 weeks and as a "base rule" it is considered to provide coverage for 6 weeks if there is no further leakage of fetal red cells. It is up to your midwife/OB when to repeat the test in cases of continued bleeding. If you are concerned, you should phone them and seek their advice.

If you are in your first trimester, the dose of Anti-D administered is sufficient to cover the entire fetal volume of a singleton pregnancy at that gestation which is why a kleihauer test is not routinely performed. It is not common to administer further doses within the first trimester.

Please phone your care provider if you are worried.

#5 Jadey73

Posted 20 January 2013 - 12:19 AM

OP, I agree with deejie's info on this.  My OB and midwives were extra cautious I think - by 16 weeks I'd had 5 doses of anti-D, initially 250 IU, then a couple of 625 IU doses to cover 2 large bleeds.  I was having them weekly at one point when bleeding fresh blood.  I also had the kleihauer test early on. I perhaps needed extra shots as the bleeding was fairly heavy.

Thankfully no further doses have been needed for the last 8 weeks and there's only very slight old bleeding now. I just have the 2 standard trimester 2/3 doses to go.

I agree to contact your care providers (OB, midwife, etc) if you're worried or need further info specific to your case. That will help you work with them to reduce any risks to bub.

All the best  original.gif

#6 Lady Lovely Locks

Posted 20 January 2013 - 08:36 AM

Wow, I'm Rh- and didn't get told about this after my baby, only that it might be harder to conceive/carry subsequent baby to term?

#7 monkeys mum

Posted 20 January 2013 - 12:21 PM

QUOTE (~Jot~ @ 19/01/2013, 07:57 PM) <{POST_SNAPBACK}>
From memory, the shot is effective for about 6-8 weeks I think. Last pregnancy I bled heavily for 7 weeks, I only had one anti D shot during that time.

I bled heavily and often in my second pregnancy and had quite a few doses of anti D, everybody is different, every pregnancy is different, and some care givers have different knowledge on the matter or methods of treatment.

OP we can only share what has happened to us or our experience, you really do need to contact your care providers as they really would be the best ones to tell you whether you need another shot or not.

FWIW my second pregnancy I had to ring the midwives any time I had a bleed and they advised me whether i needed to go in via Emergency. Going in via Emergency is how my local hospital deals with it they then send you up to the midwives.

I hope everything works out.

#8 Isolabella

Posted 20 January 2013 - 03:12 PM

In first trimester In two if my PGs I had bleeding at 8.5wks (had  Anti D shot same day) and continued to spot for up to two weeks. I was told that first shot was sufficient for the spotting.

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