I tend to always have dream patterns. What I mean by this, is the first week of the month I will remember some dreams but not all. The dreams I remember are somewhat fuzzy but I do remember the basics. The second and third week, my dreams are extremely vivid and I have the abilities to lucid dream. My dreams will play out like an entire movie and it feels like 2 hours long. I am a screenwriter and I get all my ideas from dreams. Often my dreams will take place in different cities and countries. I've even been able to speak fluently the native language of where I am. But the fourth week of the month, I don't remember any of my dreams. It's the same pattern every month. Does anyone else have this? Do you think I train my brain to only remember dreams and lucid dream at the same time of the month?
I find that I'll go for several nights and be able to remember dreams, and then I might go for a week or even longer and not remember my dreams. It sounds like you're keeping really good track of your dreams to know which weeks you are dreaming in. I keep a dream journal, and that is very helpful. I don't think you're really training yourself to dream in patterns. I think we all (men and women) have certain cycles to our bodies--biorhythms--that affect us.
Dream recall and vividity are effected by many different things in your waking life. Stress, sleep cycles, diet, how comfortable you are and intent can all effect your dream recall and vivity of the dreams. I don't know how your typical month plans out, so I cannot speak for you, but there could be a few things that are changing your recall and vividity. Maybe your sleep cycle and pattern changes during the month, meaning less rested sleep. That could lead to decreased recall at certain points. Maybe your diet changes throughout the month. Diet has been shown to effect recall and vividity, certain vitamins (B6 for example) and chemicals in your diet heavily effect your recall and vividity. The same can apply to the other things that can effect your dreaming sleep. Now, to the idea that your training your brain to only remember dreams at certain times, this is plausible. I've found that dream recall can be heavily dependent on intent, and how much you will yourself to remember dreams. Dreams seem to hold very temporary slot in your memory, and the added subconscious intent to remember them, can go a long way to fortifying them in your memory. You can also try a few techniques to help your recall on weeks that you know it might be hazy or non-existent. One commonly recommended technique is to not move, or open your eyes when you wake up. Then you try and remember your dreams, working your way backwards till you get as far as you can go. If you can only remember glimpses, think about these, something will eventually remind you of what happened before or after that.