Some fibers from the ventral cochlear nucleus cross the midline in the trapezoid body. Thus, cells in the superior olive receive inputs from both ears and are the first place in the central auditory system where binaural processing (stereo hearing) is possible. The output of the superior olive travels in the lateral lemniscus.
Delay caused by a short stress time is usually a week or two, then you ovulate normally. However, under continued stress (heavy exercise, malnutrition, etc.) you can be anovulatory for a very long time. If you are having problems in this area, have a look at this book: Fertility, Cycles & Nutrition 4th Edition.
Cycles often shorten to around a 24 day cycle or even less. Heavy spotting often occurs between periods during this stage. Cycles increase in time at this point, and periods will often occur every two months or even longer. Spotting will still occur in many cases, but it is usually much lighter. The final stages of menopause involve missing periods for three to eleven months at a time.