Just to pass along...I went for my first visit to the fertility specialist a few weeks ago.  He asked what kind of lubricant we use and when I told him we bought preseed bc it was supposed to be good for conception.  He said that he can put a drop of preseed on a sample of sperm under a scope and watch the sperm die. It really upset me bc we have spent more on that junk trying for 2 years...it's a lie.  He said the only thing safe to use is mineral oil. During the time that you're not ovulating, he said to use whatever you want.