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Premenstrual water retention

Premenstrual water retention is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Premenstrual water retention rather than just read about it. In short: Premenstrual water retention (or premenstrual fluid retention) is the buildup of additional water or fluid in the body. This phenomenon can be seen in various forms, including increasing weight gain and swollen belly, legs, or ankles.

Key takeaways

  • Premenstrual water retention belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Premenstrual water retention to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Premenstrual water retention from memory before moving on to harder problems.

Reference excerpt

Premenstrual water retention (or premenstrual fluid retention) is the buildup of additional water or fluid in the body. This phenomenon can be seen in various forms, including increasing weight gain and swollen belly, legs, or ankles. Water retention is felt by some women of all backgrounds before their menstruation onset, and is listed as one of the most common premenstrual symptoms, in addition to cramping and back pain. Age is potentially linked to the intensity of symptoms, with the maximum symptom intensity experienced around age 35. Water retention is an element in assessing premenstrual syndrome (PMS), a set of disruptive symptoms experienced by women before menstruation. Water retention itself can cause other symptoms of PMS, such as body aches, headaches, and nausea. The duration of symptoms can vary from a few days to two weeks. Premenstrual water retention should be carefully watched if weight is gained quickly within days. Water retention can cause serious consequences in people who have a kidney or cardiovascular disease, so these people should take extra caution when experiencing this symptom. The cause of water retention remains unclear. It is thought to be caused by hormone changes during the menstrual cycle through high levels of circulating progesterone, estrogen, and prolactin, which stimulate secretory cells in the body, but a study found no correlation between water retention severity and serum levels of progesterone or estradiol. It is also suggested that dietary factors may play a role, such as salt and magnesium consumption, and fluid intake. There are methods to relieve or manage water retention and related symptoms. These include both medication (such as water pills) and non-medication management (such as diet control).

Symptoms People of all ages who have periods have reported water retention symptoms days prior to their menstrual cycle. The symptoms can appear up to two weeks before the menstrual cycle (before the luteal phase) and can present as physical symptoms such as breast tenderness, weight gain, and bloating. The Penn Daily Symptom Rating Form was used in multiple studies that demonstrated these symptoms as core symptoms of the premenstrual cycle.

Causes Water retention during the premenstrual cycle can be linked to the use of conventional oral contraceptives. This is due to them containing estrogen and progestin. Synthetic progestin lacks the ability to antagonize mineralocorticoid receptors, leading to more sodium and water retention and subsequently, temporary weight gain. In addition, estrogen is known to interfere with the renin-angiotensin-aldosterone system (RAAS), since high concentrations of estrogen causes the release of more angiotensin II and aldosterone.

Treatment

Overview There are pharmacological and non-pharmacological treatment options in alleviating symptoms and providing relief during the phase of premenstrual fluid retention. Currently, pharmacological agents that are often used to treat premenstrual water retention in removing or limiting the fluid that is present. Non-pharmacological considerations to reduce the effects of the condition is focused on an individual's diet and activity levels such as exercise

Pharmacological

Hormonal treatments Hormonal treatments such as oral contraceptives or intrauterine devices (IUDS) alters the menstrual cycle and lessen the amount of fluid retention. Within the four phases of the menstrual cycle, water retention occurs during the Luteal phase due to the production of the hormone progesterone and estrogen. The increase of these hormones results in an increase in water retention. Hormonal treatments are then used to reduce the amount of progesterone and estrogen that are produces and therefore, leading to a reduce amount of fluid.

Diuretics In the setting of increased fluid retention, the use of Diuretics is for the removal of fluid in the body. Diuretics are known as one of the main therapies for volume overload and includes several classes whose mechanisms of actions, and pharmacokinetics are involved in the principles of nephrology. The therapy consists of drugs that pharmacologically adjusts the renal fluid regulation in favor of excreting water and electrolytes. This class of drugs works to achieve the objective of fluid removal through the increase in production and volume of urine.

Midol A popular pharmacologic over-the-counter treatment on the market to alleviate symptoms associated with menstrual cycles in the USA is Midol. More specifically, many Midol products contain a mild diuretic in their active ingredients to help with bloating. Pamabrom helps relief premenstrual and menstrual symptoms of water retention. It is a xanthine derivative that acts as a mild, short-acting diuretic that eliminates sodium and chloride and sometimes potassium. Although the exact mechanism of how this works is still unclear, it is speculated to be due to increasing the GFR (glomerular filtration rate) and decreasing sodium reabsorption in the proximal tubule. Some Midol products also contain caffeine as a diuretic. Caffeine increases the GFR by inhibiting adenosine receptors, thus preventing vasoconstriction of the afferent arteriole in the renal system.

Inhibition of prostaglandins Studies shows that minimizing of the use of the medication class non-steroidal anti inflammatory drugs (NSAIDs) such as Naproxen and Ibuprofen will reduce premenstrual fluid retention. NSAIDs mechanism of action consists of the inhibition of cyclooxygenase (COX) which further inhibits the production of prostaglandins and resulting in the reduction of renal water and sodium excretion in the kidneys.

Non-pharmacological

Magnesium supplements There is ongoing research regarding the efficacy of magnesium supplement in improving premenstrual symptoms and effectively reducing water retention. They may increase fluid output which can reduce premenstrual fluid retention and alleviate symptoms.

Exercise In several studies, it was shown that people experiencing PMS symptoms had a decrease in water retention and breast tenderness when they exercised regularly compared to those who did not.

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Premenstrual water retention

Start with the simplest possible case. Write down what Premenstrual water retention claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Premenstrual water retention before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Premenstrual water retention ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Premenstrual water retention

In research
Premenstrual water retention appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Premenstrual water retention in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Premenstrual water retention is common in secondary-school and first-year university syllabi. It links to neighbouring topics Breast, Menstrual cycle, so understanding it makes those chapters shorter.
In everyday life
Look for Premenstrual water retention outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Premenstrual water retention in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Premenstrual water retention means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Premenstrual water retention out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Premenstrual water retention in simple terms?

Premenstrual water retention (or premenstrual fluid retention) is the buildup of additional water or fluid in the body. This phenomenon can be seen in various forms, including increasing weight gain and swollen belly, legs, or ankles.

Why does Premenstrual water retention matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Premenstrual water retention?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Premenstrual water retention.

Tags

  • Breast
  • Menstrual cycle

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