Likely Causes Of Irregular flow.
It is perfectly normal to experience some irregularity in your menstrual cycle from time to time, especially during stressful times or due to illness. For most women, cycle regularity will return once the stress and illness are resolved.
For women with chronic irregularity, it is likely that there is an underlying hormonal imbalance (probably with estrogen and progesterone) that is impacting the frequency of ovulation and/or menstruation. While it is not always easy to identify why a hormonal imbalance is present, there are a couple of known causes of hormonal imbalances in trying to conceive women.
A common cause of hormonal imbalance is the medical condition known as Polycystic Ovarian Syndrome (PCOS). One of the symptoms of PCOS is the stimulation of multiple follicles that generate high levels of estrogen, without the successful release of an egg. The excessive estrogen stimulates the uterine lining to thicken to a point where it must slough off, which results in menstrual bleeding even though no ovulation ever occurred.
Women who are battling eating disorders often have hormonal imbalances, which result in irregular or completely absent menstrual periods (called amenorrhea). In addition, women who exercise to excess (for example 3 hours per day of strenuous exercise) can become irregular. The lack of adequate nutrition resulting from anorexia and/or physical stress caused by excessive exercise can alter the chemistry of the brain, making it difficult for the brain to trigger the hormones necessary for follicle development. Lack of follicle development can cause estrogen deficiency.
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