A progesterone deficiency can also be one of the reasons that your periods are irregular. Irregular periods are ones that vary in length from month to month. There are, of course, many reasons for your monthly cycle to be irregular, and having low progesterone levels is one reason.
Dr. Nivin Todd on WebMD explains that abnormal fluctuations in your body’s levels of progesterone and estrogen can disrupt the regularity of your period.8
Spotting before period
If you notice spotting before your period or light vaginal bleeding after your period, it could be an indicator of low progesterone.
When discussing the importance of progesterone for women’s reproductive health, the journal Therapeutics and Clinical Risk Management found that progesterone deficiency can cause vaginal spotting. The journal reported that low levels of progesterone can cause abnormal uterine bleeding.3
Low levels of progesterone in your body can cause your thyroid to become underactive. The symptoms of hypothyroidism include extreme fatigue, depression, mood swings and irregular menstruation.
According to a study published in the journal Clinical Endocrinology, your thyroid function is closely related to progesterone levels in your body.
The researchers discovered that increasing progesterone levels also cause the thyroid to produce more thyroid hormone.9
Apart from increasing levels of progesterone, there are other ways to help naturally treat an underactive thyroid.
Premenstrual Syndrome (PMS)
Hormonal imbalances, including a progesterone deficiency, can aggravate symptoms of premenstrual syndrome. PMS causes mood swings, depression, stomach spasms, and bloating. A severe form of premenstrual syndrome is Premenstrual Dysphoric Disorder (PMDD).
The Harvard Review of Psychiatry reported that a deficiency in progesterone levels interacts with neurotransmitters in the brain and causes mood changes. In fact, they found that increasing progesterone levels rather that estrogen levels, helps to reduce the experience of mood swings.10
To help ease the symptoms of PMS, you can find helpful advice and natural treatments in my article on the many ways to beat PMS naturally.
Another symptom of having too little progesterone hormone is anxiety. Feelings of anxiety are also characteristic of PMDD and can be difficult to deal with when the body is going through hormonal turbulence.
Dr. Sundström Poromaa on MedScape.com said that low progesterone plays a major role in PMDD and causes its related symptoms like anxiety, irritability, depression, and anger.11 A study carried out by Dr. Poromaa found that progesterone levels in women can make them prone to feelings of anxiety.