A lady’s entire body does create less estrogen as she ages, although the causes of premature ovarian failure are still mostly unknown. At times the cervix won't be able to generate the top type of mucus to allow the sperm to journey from the cervix into your uterus. Hypothalamic dysfunction: https://gatherbookmarks.com/story20078054/not-known-factual-statements-about-irregular-ovulation-but-regular-periods