When you sleep does the longer you sleep make you remember more of your dreams?

I have studied dreams and your question can apply differently to everyone. I find I will dream for 2 or 3 hours and remember everything in it, and also slightly wake up cause I have to go to the bathroom or some other reason, but I will fight off getting up and stay submerged in my dream cause I love dreaming and figuring out what it means. But even when I dream for 2 or 3 hours, I can all of a sudden forget my whole dream sequence and I find that really weird. I have not pinpointed why some dreams stay in memory and others do not. It could be because the sleep goes heavier beyond REM and that causes the semi-conscience mind to forget as the sleep turns heavier. But there are a host of different reasons for memorizing and not memorizing dreams. Sometimes I will try hard to memorize the dream when I get up and I do for a few minutes then all of a sudden the deep detailed dream is forgotten. Longer sleep could make that happen yes. With longer sleep there is more time for the mind to drift into a heavier phase of sleep and that would cause the forgetting of your dream.