Most people use 105 days POS. However, Jeff Ronne says that he believes it is actually an average of 123 days post ovulation. He uses the 105 days POS because it is easier to distinguish the POS than the ovulation, because you may not be home to see the ovulation. The female that gave me a litter last year never had a POS, but she gave birth 132 days post ovulation. The female in the pic above also never had a POS, so I counted 123 days post ovulation to get the due date of Feb. 26.

Hope this helps,
Matt

[ Show Entire Thread ]