Tag: hormone health

If you’ve ever been told to get bloods done on day 3 and wondered why that specific day matters, or felt frustrated trying to time a test around an unpredictable cycle, this guide is for you. We’re going to explain not just when to test, but why the timing matters at a biological level, what each hormone is actually measuring, and what to do when life doesn’t cooperate with your cycle. First: What does “day 3 of your cycle” mean? Day 1 of your cycle is the first day of your period, this means full menstrual flow, not spotting. If you see light spotting on Monday and Tuesday but don’t experience a proper flow until Wednesday, Wednesday is your day 1. Count forward from there: day 3 is the third day of your period (in this scenario that would be Friday). If your period is less than 3 days, day 3 is the third day after your period starts.  This matters because starting the count from spotting rather than full flow is one of the most common reasons people test at the wrong time. How does the menstrual cycle affect hormone levels? To understand why day 3 matters, it helps to have a basic picture of what’s happening in your body across the menstrual cycle. Your menstrual cycle is divided into two main phases separated by ovulation. The follicular phase always begins on day 1 of the menstrual cycle and ends with ovulation. In a 28-day cycle, the follicular phase extends from day 1 to approximately day 14. The luteal phase then follows ovulation and typically lasts 14 days, ending when your next period begins. The follicular phase is a period of rapid hormonal change, making it significant for hormone testing. When the previous menstrual cycle completes, levels of oestrogen and progesterone decrease. This triggers the release of follicle-stimulating hormone (FSH) into circulation.  Therefore, the days right around day 3 are when your body’s hormone system essentially resets and returns to its baseline. This is precisely why it’s the ideal time to take a snapshot of your reproductive hormones. Which hormones can be tested on day 3, and what does each one tell us? At Hertility, we test a broader panel than many providers. Here’s a detailed breakdown of each hormone in our Advanced At-Home Hormone and Fertility Test and why its timing matters. The Cycling Hormones These are tested on day 3 as mentioned earlier because they are at their ‘baseline’ around the first few days of your cycle. FSH (follicle-stimulating hormone) FSH is made by the pituitary gland in the brain and is the primary driver of egg development. FSH stimulates the production of oestradiol and eggs (oocytes) during the first half of the menstrual cycle.  Your FSH on day 3 might tell us whether the body is working as we would expect, or a little bit harder to induce follicular growth which may indicate reduced ovarian reserve, suggesting the egg supply could be beginning to decline.  Oestradiol (E2) Oestradiol is the primary form of oestrogen produced by the ovaries, and it plays a complex, interconnected role with FSH. Oestradiol serves as the brakes for the brain’s production of FSH. It travels from the ovaries to the brain and signals it to dial down FSH levels.  This is why FSH and oestradiol are always measured together. Not only their results, but their interpretation relative to each other is important for our clinicians to determine whether there is anything going on.  LH (luteinising hormone) LH is best known as the hormone that surges dramatically at mid-cycle to trigger ovulation. But measuring it at baseline on day 3 also tells us something important. If LH is too high on day 3, it may signal a condition like polycystic ovary syndrome (PCOS). An elevated LH:FSH ratio in the early follicular phase is one of the hormonal patterns clinicians look for when investigating PCOS and irregular ovulation. AMH (anti-Müllerian hormone) AMH is one of the most valuable markers for assessing ovarian reserve, and it works quite differently from the cycling hormones.  Historically, it has been thought that AMH doesn’t fluctuate dramatically across the cycle in the same way, so could be measured at any point during the menstrual cycle. However, research does suggest there may be some variation, which is why at Hertility, we standardise AMH testing to the days 2-5 window. This allows us to negate any potential fluctuation and ensure our results are consistent and comparable over time. AMH tells us about egg quantity (how many follicles are available) but it’s important to note it doesn’t directly measure egg quality. It should always be interpreted alongside your other results and your clinical history. Thyroid hormones (TSH and free T4) Thyroid hormones don’t fluctuate with the menstrual cycle, so strictly speaking they don’t need to be tested on day 3. We include them in the same panel because thyroid dysfunction, both overactive and underactive thyroid can significantly disrupt ovulation, cycle regularity, and fertility outcomes. Testing them alongside your reproductive hormones gives a more complete picture of your overall hormonal health in a single sample. Androgens (including testosterone) Androgens like testosterone are relatively stable across the menstrual cycle, making cycle timing less critical for these markers. That said, testing during the early follicular phase, when oestrogen is at its lowest means androgens aren’t being masked or influenced by rising oestrogen levels. For women investigating conditions such as PCOS, elevated androgens are an important part of the diagnostic picture. Prolactin Prolactin can technically be tested on any day. What does affect prolactin is the time of day and lifestyle factors. Prolactin naturally rises during sleep and can remain elevated for some hours after waking. Stress, physical activity, and even eating can temporarily raise levels. This is why Hertility asks you to take your sample first thing in the morning, before eating or exercise, to capture the most stable reading. The science behind day 3 testing: what does the research actually say? Day […]

Can smoking cause hormonal imbalances? Just like the negative consequences to heart and lung health, smoking can also negatively impact our reproductive health. Read on to find out.  Quick facts: How smoking affects the body It’s a well-known fact that smoking can have a negative impact on health, with both active and passive smoking being associated with multiple forms of cancer, diabetes and heart disease. Despite this, in the UK, as of 2019, 28% of men and 22% of women aged between 25 and 34 years are current smokers, according to published health data in England (1)—and a whopping 175 million people assigned-female-at-birth (AFAB) smoke worldwide. But whilst smoking’s effects on the heart and lungs are fairly common knowledge, fewer people are aware that it can also influence the body’s hormones. But how exactly are hormones and smoking linked? In this article we’ll look at: Does smoking affect hormones? Despite the lack of public awareness, there is plenty of research that shows how smoking can impact and even wreak havoc on our hormonal health. The chemical components of cigarette and cigar smoke can disrupt the normal functioning of our bodily systems, including the endocrine system. The endocrine system is a network of glands which influence the production, secretion and regulation of hormones throughout the body, such as the hypothalamus, thyroid, adrenal gland, and even the ovaries.  This disruption might lead to lasting effects on all kinds of hormonally regulated processes, including sexual function and reproductive potential, our metabolism and even our sleep.  As mentioned, both active and passive smoking (also known as second-hand smoking) can cause these nasty effects, with some research even indicating that prolonged exposure and inhalation of cigarette smoke can even affect the onset of menopause (3). There are over 4,000 substances in cigarettes that display reproductive toxicity. How does smoking affect different hormones? Smoking has been linked to abnormal changes and fluctuations in various hormone levels, including: Let’s take a look at each of these in detail. Smoking and testosterone Studies have consistently shown that smoking increases testosterone in AFAB individuals. Those who smoke have been found to have higher serum testosterone levels in their blood than those who don’t (4).  This is because smoking is inherently pro-androgenic, meaning it has a positive effect on androgen hormones like testosterone. Increased testosterone levels can bring on side effects such as excess body hair growth (hirsutism), acne, greasy hair and skin, irregular periods and low libido. The main reason for smoking’s pro-androgenic effects lies with nicotine. As tobacco is metabolised, the nicotine within it produces a compound known as cotinine, which inhibits testosterone breakdown (17). However, it’s interesting to note that similar studies performed on ageing men have indicated that, over a long enough timespan, smoking can reduce testosterone levels in those assigned-male-at-birth (AMAB) (16). Smoking and oestrogen As well as being pro-androgenic, smoking is also anti-oestrogenic, which means it has a negative effect on oestrogen levels. Studies have shown that women who smoke have  lower progesterone and oestrogen levels in both their blood and follicular fluid (the fluid which surrounds the developing egg, important for egg growth) (2,5).  Smoking even affects the conversion of androstenedione to oestradiol by cells within the eggs (2). This switch is mainly driven by the effects smoking has on the production of these hormones.  As well as negatively affecting oestrogen production and metabolism by your liver, smoking increases the levels of a hormone called sex hormone-binding globulin (SHBG) which binds to oestrogen—preventing it from performing its essential functions around the body. Symptoms of low oestrogen can include low libido, fatigue, and negative mood changes. Smoking and gonadotropins Follicle-stimulating hormone (FSH) and luteinising hormone (LH) are both gonadotropin hormones. These are hormones released from the hypothalamus (a part of the brain) to regulate the menstrual cycle and induce ovulation.  Unsurprisingly, smoking has been found to affect gonadotropin levels as well. Studies have shown that habitual smokers tend to have higher levels of FSH and LH in the first half of their cycle and during their periods, than non-smokers (6,7).  Disrupted FSH and LH levels can lead to problems with both fertility and menopause. Smoking and Anti-müllerian hormone Anti-müllerian hormone (AMH) is produced by granulosa cells within the ovarian follicles. It’s used as an indicator of ovarian reserve, sometimes referred to as egg count. Research has shown that smokers generally have lower AMH levels. One study in particular found that current smokers have  44% lower AMH levels than non-smokers (8), indicating that smoking can be directly toxic to the eggs within the ovaries. Another study showed that, in smokers, the fluid produced by the granulosa cells (known as follicular fluid) also contains increased levels of harmful nicotine toxins (9). Chemicals derived from cigarettes and smoking have even been detected in the cervical mucus (10). Smoking and thyroid hormones Cigarette smoke has been found to have both inhibitory and stimulatory effects on thyroid hormones. Both active and passive smoking have been linked to decreased levels of thyroid-stimulating hormone (TSH) and increased levels of free thyroxine (T4) and triiodothyronine (T3) (11,12).  Because the thyroid gland plays an important role in the regulation of many different bodily functions such as growth and development, disruption in thyroid level can have huge knock on effects all around the body. The thyroid can also affect fertility.Smoking is consequently a known risk factor for thyroid-related disorders, especially Grave’s disease and Goitres (13,14). Smoking and prolactin Prolactin is produced by the pituitary gland in the brain and is most commonly associated with milk production and altering breast physiology, but it also has a number of different roles throughout the body.  Chronic long-term smoking has been found to be associated with decreased prolactin levels (14), which can cause irregular menstrual cycles, difficulty breastfeeding and negative mood changes. Smoking and cortisol Smoking has also been linked to increased cortisol levels in the blood. It also affects hormones involved in the production of cortisol (2), which can disrupt the regulation of its levels. Cortisol […]

Testosterone is an important androgen hormone in people of all sexes. In this article, we’ll cover exactly what it does in the body, what the symptoms and causes of high or low testosterone are and how you can ensure your levels are balanced and healthy.  Quick facts: What is testosterone? Testosterone is an important hormone for regulating sex drive (libido), bone and muscle mass and fat distribution. It’s part of a group of hormones called androgens.  There are a lot of misconceptions about testosterone being just a “male” hormone. Whilst testosterone plays an important role in the development of the male sex organs and male secondary sex characteristics, people of all sexes have testosterone.  Everyone produces and requires a certain amount of androgen hormones for reproductive development. The difference is just how much testosterone we have based on our sex-at-birth. How is testosterone made? In women and people assigned female-at-birth, testosterone is produced by the ovaries and adrenal glands. It’s then converted to hormone–oestrogen. Testosterone production is age-dependent and it gradually declines with age. Most of the testosterone in the body is inactive. It remains bound to a protein called, sex hormone-binding globulin (SHBG). The small amount of testosterone that’s unbound and therefore active, is called freely circulating testosterone (free T).  Free T can enter cells to bring about its effects. Our free T levels are affected by the levels of SHBG. Low levels of SHBG result in higher free testosterone, whereas high levels of SHBG result in lower free testosterone. What does testosterone do in the body? Some of the functions of testosterone are: What are the symptoms of high testosterone? Excess levels of testosterone in the body is called hyperandrogenism. This can bring about symptoms like:  Some studies suggest that high testosterone levels may increase the risk of developing high cholesterol, heart disease and type 2 diabetes. What causes high testosterone levels? The most common causes of high testosterone levels are underlying health conditions. It can also be caused by certain medications and lifestyle factors. Let’s look at the main ones… PCOS Polycystic ovary syndrome (PCOS) is a hormonal and metabolic condition affecting 1 in 10. The exact cause is still being researched, however, the proposed causes include an excess of androgens and insulin, genetic and environmental factors. If you suspect you might have PCOS, our at-home tests can give you a better insight into your hormones.  Congenital andreal hyperplasia Congenital adrenal hyperplasia (CAH) is an inherited condition that affects the adrenal glands. These are small glands located on top of the kidney. They produce hormones like cortisol (stress hormone), dehydroepiandrosterone (DHEA) and testosterone. People with CAH are unable to produce an enzyme necessary to regulate the production of these hormones, which can result in an overproduction of testosterone. It’s been found to be more common in some ethnic groups such as people of Hispanic, Mediterranean, Yugoslavian and Ashkenazi Jewish descent. Cushing’s syndrome is another hormonal condition impacting the adrenal glands. It results in excessive cortisol and androgen production. Medications Testosterone levels can rise due to certain medications, such as: Alcohol Excessive alcohol consumption may increase levels of testosterone in premenopausal women, however, research is conflicting.  How to lower my testosterone levels? Treatment for high testosterone depends on the cause, but generally, it is a combination of lifestyle changes and medications. Achieving a healthy weight by including a healthy balanced diet and exercise routine may help with the symptoms of a hormonal balance.  Medications used to treat high testosterone, and associated symptoms include: What are the symptoms of low testosterone? If you’re experiencing low testosterone, you may experience some of the following symptoms:  Low testosterone over a long period may also contribute to long-term health conditions such as heart disease, memory issues and loss of bone density. Often, the symptoms of low testosterone in women are undiagnosed or misdiagnosed. Some of the conditions that low testosterone may be mistaken for include stress, depression and the side effects of menopausal changes in women. What could cause low testosterone levels? The most common causes of low testosterone levels are often age, underlying conditions and problems with certain glands. Age Testosterone levels naturally decrease as we age. As it’s produced in the ovaries, the natural decrease in ovarian function with age means that some may experience low testosterone levels as they transition from the perimenopausal phase into menopause.  Underlying health conditions Premature ovarian insufficiency (POI) can increase your risk of low testosterone. Additionally, surgery, such as the removal of the ovaries, can cause lowered testosterone levels.  Problems with the hypothalamus or pituitary gland Underlying health conditions impacting the pituitary, hypothalamus, or adrenal glands can also cause lowered testosterone levels. This is because these parts of the brain are responsible for the secretion of hormones which control the proper functioning of the ovaries.  A disruption in the pituitary gland can also impact the adrenal gland. Addison’s disease or adrenal insufficiency is a hormonal condition that occurs due to underactive adrenal glands and can cause a low level of its hormones. What can I do to increase my testosterone levels? Low testosterone levels effects and treatments in women are still being researched and treatment is usually recommended only if symptoms are significantly impacting health and quality of life.  Testosterone replacement therapy is a form of hormone replacement therapy (HRT) based on the replacement of testosterone. It may be prescribed orally, as injections, gels or skin patches. DHEA is a precursor to testosterone, and it is believed that taking DHEA supplements could increase the amount of testosterone. It is always recommended to speak with a doctor before starting any medication or supplements. How to test testosterone levels? If you’re experiencing any of the symptoms mentioned above, our Advanced At-Home Hormone and Fertility Test can determine your testosterone levels. Hormone testing is the only way to know what your testosterone levels are for definite.  Our Doctors can recommend a care plan for you, based on your symptoms, hormone levels and specific health goals. Resources: