I asked one of our perinatologists about this a while back and she knew of no reason for breastfeeding to affect results of maternal serum screening tests.

Cordelia Merritt, RN BSN IBCLC

On Apr 14, 2010, at 10:02 AM, LACTNET automatic digest system wrote:

> Date:    Wed, 14 Apr 2010 06:39:49 -0400
> From:    Margaret and Stewart Wills <[log in to unmask]>
> Subject: Re: LACTNET Digest - 12 Apr 2010 to 13 Apr 2010 - Special issue (#2010-310)
> 
> Has anyone know if breastfeeding during pregnancy  could resulting in 
> unusual reading on the first trimester screening tests, measuring HCG 
> (free Beta human chorionic gonadotropin) and/or PAAP-A (pregnancy 
> associated plasma protein-A)?  I know that the readings can be off if 
> the pregnancy is misdated.
> 
> Margaret Wills, IBCLC Maryland


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