The Mirena IUD can lower milk supply--there are case reports. I was not 
aware that the Copper 7 could.

There is a study using Nova-T (non-hormonal) vs a 10 and 30 mg 
levonorgestrel releasing IUD.

Contraception 182;25:279-291. The duration was longest in the 
non-hormonal group but it was not
significant. What was significant is that those using the 30mg IUD were 
significanlty more likely not to
be breastfeeding 75 days after insertion 44% vs. 79%. Chris Betzold NP 
CLC MSN


Christine M. Betzold NP CLC MSN

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