Archiver > AUTOSOMAL-DNA > 2016-04 > 1461052446

From: "Tim Janzen" <>
Subject: [AUTOSOMAL-DNA] New changes in matching coming at forthe AncestryDNA test
Date: Tue, 19 Apr 2016 00:54:06 -0700

Today I was on a conference call with a number of other genetic genealogists
and leaders of the DNA team at I would like to make sure that
everyone who has done the AncestryDNA test knows that there are some
imminent changes in the matching algorithm at This change
will result in the loss of some matches and the gain of new matches. There
will probably be a small net gain in terms of matches for most people.
There will probably be a loss of some valid matches for everyone. Most of
the losses will likely be people who share between 5 cMs and 6 cMs with you.
In order to preserve these matches in your match list at you
will need to either add a note to the match or make them starred. The
thresholds for the predicted relationship will also be changed. As a
general rule, the number of cMs two people will need to share in order to be
predicted as being related at a specific level of genealogical relationship
will increase. The date of this change has not been set by
yet. It could be as early as tomorrow and could be as late as 2 weeks from
now. In any case, it is strongly advised that you either add notes or make
matches starred if they are low level matches to you and you want to make
sure that they aren't dropped from your match list when the new matching
algorithm is put in place. will provide a revised white paper
that will explain these changes in greater detail. Overall, the phasing of
the autosomal haplotypes is being improved.


Tim Janzen

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