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Old 10-23-2009, 07:24 PM   #1
 
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Default Mirena IUD may cause decrease in milk supply

Dr. Jack Newman is a Canadian pediatrician who runs a breastfeeding clinic and a well know bf authority.

http://www.asnatureintended.info/3/p...stfeeding.html

Quote:
A Message from Dr. Jack Newman regarding Mirena IUD interfering with Breastfeeding: 10/22/2009

We are receiving more and more reports from mothers of a decrease in milk production associated with the Mirena IUD. Today I received two such reports. Given the constant chronological relationship between the placement of the IUD and the motherís decrease in milk production (1 to 2 weeks), it is quite possible that the decrease in milk production is a result of the IUD.

Of course, it is also likely that not all women will have a significant decrease; nobody contacts me when they donít have a decreased production. But it is also likely that only a tiny percentage of women who do have a decrease actually contact me.

I think we need to be prudent and warn women about this possible side effect of the Mirena. All hormonal contraceptive methods should be avoided by breastfeeding mothers if possible.

Please forward to all your contacts.

Jack Newman, MD
http://www.drjacknewman.com/
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Last edited by geeky; 10-24-2009 at 01:00 PM. Reason: oops
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Old 10-24-2009, 07:06 AM   #2
 
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interesting, I almost went with Mirena this time but felt we were not going to wait long enough between kids to warrant it.

You may want to change your title, you said increase and article says decrease
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Old 10-24-2009, 08:22 AM   #3
 
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I was so excited to read this, as many women struggle with low supply. But I see now that it's a decrease in production.
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Old 10-24-2009, 01:01 PM   #4
 
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Duh, I am a moron.

I fixed it.

Still important to know, as I have heard Mirena recommended a lot to nursing moms.
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Old 10-24-2009, 01:34 PM   #5
 
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Quote:
Originally Posted by geeky View Post
Still important to know, as I have heard Mirena recommended a lot to nursing moms.
ITA. Why take the chance in messing up your milk supply when there are other viable birth control options out there.

Thanks for link.
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Old 10-24-2009, 02:37 PM   #6
 
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I have the Mirena and it was recommended to me as because I was BFing but my toddler was already 14 months at the time.

I personally didn't notice a difference in my supply but I deliberately waited until after I had reached my own personal "must breastfeed until..." milestone before even considering it.

Now, with both my kids, I did notice a decrease in supply within the first month or two of getting my period. And that is also usually the time that most women will get the IUD. I wonder if that aspect of the timing might also play into it?
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Old 10-26-2009, 07:10 PM   #7
 
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I chose a non hormonal BC while I was nursing because I was leery of my supply being affected. Despite the claims that Mirena doesn't affect supply, I am glad someone actually looked into this.
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Old 10-27-2009, 08:22 PM   #8
 
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I think Mad Scientist hit the nail on the head - people get the Mirena placed at a time that they woudl naturally have a decrease in supply.

Physiologically, it makes sense that a regular birth control pill containing estrogen would cause a decreased supply, however, Mirena is progesterone only, and this doesn't make biologic sense.
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Old 10-28-2009, 06:48 AM   #9
 
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Quote:
Originally Posted by curlylex View Post
I think Mad Scientist hit the nail on the head - people get the Mirena placed at a time that they woudl naturally have a decrease in supply.

Physiologically, it makes sense that a regular birth control pill containing estrogen would cause a decreased supply, however, Mirena is progesterone only, and this doesn't make biologic sense.
I don't think you can assume that most people get the Mirena placed when they get their period back. Some women get their periods at a few weeks pp, some don't get theirs back until 6 months or a year later. I think that hormones are complex and their interactions are not fully understood at this time. I have heard of women on the mini pill (which is also progeserone only) have supply issues which clear up when they stop the pill. I think more thorough research is warranted.
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Old 10-28-2009, 11:09 PM   #10
 
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No disrespect to Dr Newman - obviously he's an absolute godsend for many women and a well-educated man - but he is a pediatrician, not an obstetrician/gynecologist.

Mirena is not new as it has been used in Europe for many years, and it is locally administering progesterone to the uterus with minimal to no increase in blood progesterone levels. Biologically, it does not make sense that it will decrease milk supply. Dr. Newman is making a comment based on anecdotal reports from a few women - not that they are wrong, but this is far from science. Scientific literature (and I have read it) does not support this claim at this point. The literature also states that low-dose estrogen containing birth control pills have little effect on milk supply, but I would trust this assertation much less as biologically, estrogen may have that effect on milk supply.

And remember, even in studies, placebos seem to have side effects, despite being placebos! Some women may find that something decreases their supply, just by coincedence that their supply decreased as something else (unnoticed - ie: ovulation) happened.

Now, what does decrease milk supply - pregnancy! Proven!
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