I looked it up to see if tenderness usu. happens before, during or after ovulation and I found somewhere it was explaining how where the tenderness occurs is important. Mine is nipple and sides. Which they say means ovulation has occurred but prog. is low. If it is on the top and front it means estrogen is high and therefore no ovulation. I keep having chemical preg. and I am pretty sure it is from low prog. but nobody seems to want to do anything.