A recent conference report finds that the birth control pill temporarily shrinks ovaries, and cuts egg numbers, during the period patients take it--and for some weeks after going off it. This appears to be a generally temporary condition, but it can lead to a masking of true reductions in ovarian reserve. To make sure your gyno gets an accurate idea of your ovarian reserve, it may be key to get retested a few months after going off the Pill.
http://www.biosciencetechnology.com/art ... gg-numbers