Hormonally-speaking, there is no doubt that pregnancy is one of the most volatile times in a woman’s life. The combination of hormonal changes and imminent lifestyle changes wreaks havoc on most women’s moods and emotions. During the first few weeks of pregnancy, both estrogen and progesterone levels rise rapidly and can affect mood stability. By the sixth week, a woman’s estrogen level is approximately three times that of the highest point in the menstrual cycle, and many women become extremely irritable.
Because the body often successfully accommodates these fluctuations with its own self-regulating mechanisms, most women report feeling much better by the second trimester, and may even feel a sense of euphoria. But not all women adjust so readily. Approximately 1 in every 10 pregnant women experience some depression or anxiety during pregnancy, and many of those women will continue to have more serious episodes after delivery. In fact, some women never seem to recover the same emotional stability that they had prior to pregnancy and childbirth. If left untreated, mood disorders during pregnancy can lead to serious repercussions for the baby’s health, as well as the important bonding between mother and child after birth.
For many years, people felt that postnatal depression or the “baby blues” primarily affected those women who were weak or lacking in self-control. The common advice was to “pull yourself together.” But with the passage of time, that attitude slowly faded and postnatal depression gained credence as a medical phenomenon.
Symptoms of postnatal depression differ significantly from those of “clinical” or “normal” depression, according to Dr. Dalton. For example, women with depression typically have difficulty sleeping, while women with postnatal depression usually have a yearning for sleep and can’t seem to get enough of it. (Obviously, some of that yearning may result from the sleep deprivation that often accompanies a newborn baby, but not to the extent that it occurs.) Other differences with postnatal depression typically include weight gain (instead of weight loss) and generally feeling best in the morning (while the morning is usually when women with depression feel their worst).
Despite the differences associated with postnatal depression, it shares many similarities with PMS. Dr. Dalton believes that, in many cases, postnatal depression can be blamed for the onset of PMS. She states that over 80 percent of the women who have once suffered from postnatal depression subsequently develop PMS.
Both postnatal depression and PMS occur during a hormonal upheaval, specifically when there is a significant drop in progesterone. Both conditions include symptoms of exhaustion, irritability, depression, and mood changes—sometimes with violent outbursts and/or suicidal tendencies. And, according to Dr. Dalton, both can be successfully treated with progesterone.
Clinician and biochemist Dr. Phyllis Bronson has conducted studies of mood disorders in women at midlife. During a personal interview, Dr. Bronson concurred that what most women fear most as they approach menopause is not hot flashes or night sweats, not breast cancer or heart disease, but losing their mind!
Most women report feeling mentally foggy or dull before they sense any of the physical symptoms of menopause. As they begin to experience irregular hormonal fluctuations, they find that they are tense and moody, have poor concentration and memory, feel an overall loss of well-being, and experience difficulty sleeping. Notice that many of these symptoms overlap with those of clinical depression.
During perimenopause, some women struggle with depression-like symptoms for the first time; others who have had previous episodes of depression may find that their symptoms reemerge. Moreover, as with PMS/PMDD, women with a mood disorder may find that previously successful treatments may seem to stop working with the onset of menopause. Mood-related symptoms may reemerge and mood swings may become more pronounced.
Notably, few people (healthcare practitioners included) discriminate between symptoms that arise from the loss of hormones versus those attributable to other factors. Especially during this stage of life, women should investigate hormone therapy as a key element in the treatment of their depression or mood-related symptoms.
Hormones Linked to Moods
Hormones are very powerful substances in our bodies, as indicated by the fact that such minute quantities produce such profound effects. Hormones are also very selective, generally having very specific and limited functions. These two characteristics help explain why we get so “out of whack” when hormonal conditions are not quite right.
Some people may argue that our moods are affected by many factors, including our social and physical environment, diet, exercise, and daily sleep patterns, just to name a few. But the reality is that those same factors also significantly affect our hormones, which regulate our brain’s response system and thereby determine our moods. Our emotional health is inextricably linked to our hormones.
Research at Rockefeller University reported on by Dr. Vliet indicates that the steroid hormones (especially estrogens, testosterone, and progesterone) are the most potent chemical signals affecting the brain. Changes in the levels of these ovarian hormones influence neurotransmitters (such as dopamine and serotonin), which affect moods.
Dr. Vliet agrees that ovarian steroids play an important regulatory role in a woman’s general sense of well-being. She reports that research suggests that there is a “previously unrecognized connection between declining hormone levels in perimenopausal women and the high incidence of depression and anxiety disorders.” She also reported on a Yale study that concluded that hormone therapy over a six-month period appeared to result in an improvement in all categories of perimenopausal symptoms, including depression, anxiety attacks, sleep disturbances, and short-term memory problems.
Aside from estrogen’s many roles in our sexual and developmental health, it is also known to be a neuro stimulant with anti-depressive effects. Estrogen levels have a domino effect on brain chemistry and moods.
Dr. Bronson states that “high levels of estrogen produce an imbalance in the system that aggravates or causes symptoms of tension and anxiety.” In fact, she says that some women with high estrogen levels may be predisposed to high levels of anxiety, and even panic attacks. On the other hand, low levels of estrogen can lead to episodes of depression.
It is interesting to note that a woman typically tends toward either an estrogen dominance or an estrogen deficiency; yet she still experiences both high and low levels due to normal fluctuations (as in PMS) or irregular fluctuations (as in perimenopause) relative to her “normal” level. During the fluctuation, she may experience mixed symptoms as the balance shifts. Mood changes associated with a woman’s declining estrogen levels tend to respond very well to estrogen therapy, with most women reporting feeling more alert and having more energy upon receiving treatment.
Dr. Bronson notes that the estrogen/ progesterone ratio is really the key to the proper treatment of mood disorders. A study by Dr. Bronson found that “a deficiency of progesterone is clearly implicated as a primary factor in mid-life anxiety patterns.” She observed that when estrogen levels were high and progesterone levels low, patients “would exhibit extreme rage, followed by [a] conciliatory, self-defeating demeanor.”
This is not surprising because the largest concentration of progesterone receptors is in the limbic area of the brain, which is the center of emotion and also called the “area of rage and violence” by animal physiologists. Progesterone has a calming effect on the brain, which suggests that a deficiency leads to varying levels of anxiety, depending on the level of the imbalance.
Recall the previous discussion regarding PMS and postnatal depression, both of which can occur with a sudden drop in progesterone and can include considerable anxiety. Dr. Dalton found that both conditions can be effectively treated with progesterone, especially if administered before symptoms develop. For PMS, she suggests supplementing with progesterone from ovulation until menstruation; for preventing postnatal depression, she recommends that progesterone therapy begin immediately after delivery, tapering off until menstruation returns.
Dr. Bronson agrees that progesterone can be an effective treatment for anxiety in perimenopausal women. However, she finds the treatment to be most effective at higher doses, specifically 400–600 mg/day, administered on the skin. Most of the women treated reported significant improvements in emotional health.
When progesterone therapy is in order, both Dr. Bronson and Dr. Dalton emphasize the importance of using bioidentical progesterone instead of progestin (see box below) to achieve the best results.
The thyroid gland produces several different hormones that have a profound effect on the body and affect every cell in one way or another, and their effects on mood are far-reaching.
The primary thyroid hormones are thyroxine (T4) and triiodothyronine (T3), which respond to pituitary thyroid-stimulating hormone (TSH) as part of the body’s complex feedback system that keeps endocrine gland secretions in sync. Thyroid hormones also affect blood glucose levels and the release of stress hormones, which obviously also affects moods. A thyroid hormone deficiency inhibits the brain’s neurotransmitters, possibly leading to depression. Thyroid hormone levels may be deficient during and after pregnancy.
Insulin and Glucose
Dr. Dalton noticed a correlation between aggressive, emotional outbursts during PMS and patients’ blood sugar levels. When asked about the time of day or circumstances immediately preceding such outbursts, her patients frequently reported that they occurred in the late morning after missing breakfast or while preparing for the evening meal, especially if that was occurring later than usual. Incidentally, many of her patients also reported confusion or forgetfulness during the time surrounding these outbursts.
Dr. Cousens believes that paying careful attention to what and when you eat is important to your emotional health. In Depression-Free for Life, he identifies foods according to a glycemic index, which compares their impact on blood sugar. He states that eating foods that are “super-high” on the glycemic index (such as white flour products, refined and sweetened cereals, and candy bars) cause “wild swings in blood sugar, a high followed by a low,” and should be avoided for that reason.