Menstruation

54 quotes found

"In societies where women might have their period only every two years or so because of frequent pregnancies and long breastfeeding, there might be fewer negative associations with menstruation, says Alma Gottlieb, professor of anthropology and gender and women's studies at the University of Illinois and author of Blood Magic: The Anthropology of Menstruation. "Yurok, a native tribe from the northwest coast of the United States stratified by class, had a group of aristocratic women who saw their periods as a time for purifying themselves," she says. As many women living in close proximity do, this group had their periods at the same time each month. "They were on a shared menstrual cycle and did a series of rituals during the cycle that they said was a period of their most heightened spiritual experience." The Rungus women from Borneo, she says, are pretty blasé about their periods. "They don't say it's pure, they don't say it's polluting," says Gottlieb. "It's just a bodily fluid that needs to be evacuated. They don't make a big deal of it." Among the Ulithi women of the South Pacific, she says, breastfeeding women join menstruating women in huts, along with their children. "It's kind of a party atmosphere." The huts can be a torturous experience for women in some places, but "there are many other variations on the theme," she says. In some parts of Ghana, West Africa, young girls sit under beautiful, ceremonial umbrellas when they begin menstruating. "The family would give her gifts and pay her homage," says Gottlieb. "She is celebrated like a queen." For the Beng women of Ivory Coast, Gottlieb found that male-imposed restrictions on menstruating women come with a more positive twist. "An older man, a religious leader in the local religion, told me menstruation is like the flower of a tree. You need the flower before the tree can fruit," she says. "That's a very different ideology than the ideology of sin, dirt, pollution.""

- Menstruation

0 likesWomenAnatomy
"To Strassmann and others in the field of evolutionary medicine, this shift from a hundred to four hundred lifetime menses is enormously significant. It means that women’s bodies are being subjected to changes and stresses that they were not necessarily designed by evolution to handle. In a brilliant and provocative book, “Is Menstruation Obsolete?,” Drs. Elsimar Coutinho and Sheldon S. Segal, two of the world’s most prominent contraceptive researchers, argue that this recent move to what they call “incessant ovulation” has become a serious problem for women’s health. It doesn’t mean that women are always better off the less they menstruate. There are times—particularly in the context of certain medical conditions—when women ought to be concerned if they aren’t menstruating: In obese women, a failure to menstruate can signal an increased risk of uterine cancer. In female athletes, a failure to menstruate can signal an increased risk of osteoporosis. But for most women, Coutinho and Segal say, incessant ovulation serves no purpose except to increase the occurrence of abdominal pain, mood shifts, migraines, endometriosis, fibroids, and anemia—the last of which, they point out, is “one of the most serious health problems in the world.” Most serious of all is the greatly increased risk of some cancers. Cancer, after all, occurs because as cells divide and reproduce they sometimes make mistakes that cripple the cells’ defenses against runaway growth. That’s one of the reasons that our risk of cancer generally increases as we age: our cells have more time to make mistakes. But this also means that any change promoting cell division has the potential to increase cancer risk, and ovulation appears to be one of those changes. Whenever a woman ovulates, an egg literally bursts through the walls of her ovaries. To heal that puncture, the cells of the ovary wall have to divide and reproduce. Every time a woman gets pregnant and bears a child, her lifetime risk of ovarian cancer drops ten per cent. Why? Possibly because, between nine months of pregnancy and the suppression of ovulation associated with breast-feeding, she stops ovulating for twelve months—and saves her ovarian walls from twelve bouts of cell division. The argument is similar for endometrial cancer. When a woman is menstruating, the estrogen that flows through her uterus stimulates the growth of the uterine lining, causing a flurry of potentially dangerous cell division. Women who do not menstruate frequently spare the endometrium that risk. Ovarian and endometrial cancer are characteristically modern diseases, consequences, in part, of a century in which women have come to menstruate four hundred times in a lifetime."

- Menstruation

0 likesWomenAnatomy
"Three central contributions to the understanding of reproduction came from ‘’Blood Magic’’. First, it definitively challenged the image of a universal taboo which operated in the same way in all societies. Second, it argued persuasively against the idea that menstruation was marked because it was always linked to female subordination, based on associations with nature, the domestic, or the undervalued. Third, with nuanced case studies it demonstrated how menstrual fluids could be used in empowering ways, in love magic, in specially esteemed forms of cooking, in establishing and coordination a ritual calendar, and in providing images of creation and transformation. That volume did not, however, veer into the New Age fashion of glorifying menstruation, eclipsing mention of its reported dangers, or purging cultural associations with death, disease, and loss (cf. Owen 1998). Since menstrual bleeding is both a sign of continued fertility and of the failure to conceive in a particular month, its regulation is of great importance to female reproductive health, and a recently published volume (Van de Walle and Renne 2000) brought together work on the medical history of menstrual regulation and the “native science” of female fertility, especially its relation to herbalism. Many herbs were used as both emmenagogues (to bring on menstruation) and abortifacients (to terminate pregnancy), and the fundamental ambiguity about the purposes for which they were employed seems to have been an important element of their popularity."

- Menstruation

0 likesWomenAnatomy
"How reliable is the woman's menstrual history in determining where she is in her cycle, namely that she is preovulatory? In a study by Novikova et al., they found the history of the first day of the last period to be unreliable 39 percent of the time (Novikova et al. 2007). In addition they found a wide range of cycle lengths with the first day of one period to the first day of the next to be 21 to 35 days. With a longer cycle the woman could be on day 17 of her cycle but still be preovulatory and with a shorter cycle she could be on day 13 of her cycle and be postovulatory. Although one may suspect the woman is approaching ovulation on pelvic exam with the presence of highly fertile mucus at the cervical os, it is impossible for a physician to determine whether the woman is preovulatory on a pelvic exam, in particular in a woman who has just been sexually assaulted. How reliable are LH testing and progesterone levels done stat in the emergency room in determining where the woman is in her cycle? The LH surge goes on over a twenty-four-hour period, and is usually detected by testing a first-morning concentrated urine. A random urine specimen, particularly late at night, may not detect the LH surge. In addition, serum progesterone levels are not emergency tests, and the results often are not available for twenty-four hours, even in major metropolitan hospitals, and even longer in small community hospitals. Therefore, this protocol may not have a timely progesterone level available to help determine if a woman is preovulatory in the emergency room."

- Menstruation

0 likesWomenAnatomy
"According to a recent hypothesis, menstruation evolved to protect the uterus oviducts from sperm-borne pathogens by dislodging infected endometrial tissue and delivering immune cells to the uterine cavity. This hypothesis predicts the following: (1) uterine pathogens should be more prevalent before menses than after menses, (2) in the life histories of females, the timing of menstruation should track pathogen burden, and (3) in primates, the copiousness of menstruation should increase with the promiscuity of the breeding system. I tested these predictions and they were not upheld by the evidence. I propose the alternative hypothesis that the uterine endometrium is shed/resorbed whenever implantation fails because cyclical regression and renewal is energetically less costly than maintaining the endometrium in the metabolically active state required for implantation. In the regressed state, oxygen consumption (per mg protein/h) in human endometria declines nearly sevenfold. The cyclicity in endometrial oxygen consumption is one component of the whole body cyclicity in metabolic rate caused by the action of the ovarian steroids on both endometrial and nonendometrial tissue. Metabolic rate is at least 7% lower, on average, during the follicular phase than during the luteal phase in women, which signifies an estimated energy savings of 53 MJ over four cycles, or nearly six days worth of food. Thus, the menstrual cycle revs up and revs down, economizing on the energy costs of reproduction. This economy is greatest during the nonbreeding season and other periods of amenorrhea when the endometrium remains in a regressed state and ovarian cycling is absent for a prolonged period of time. Twelve months of amenorrhea save an estimated 130 MJ, or the energy required by one woman for nearly half a month. By helping females to maintain body mass, energy economy will promote female fitness in any environment in which fecundity and survivorship is constrained by the food supply. Endometrial economy may be of ancient evolutionary origin because similar reproductive structures, such as the oviduct of lizards, also regress when a fertilized egg is unlikely to be present."

- Menstruation

0 likesWomenAnatomy
"Knowing that a woman is fertile (generally speaking) only for about three to five days out of the month and that her fertility is naturally obstructed (e.g. by the sticky mucous produced by progesterone around the cervix) the other days of the month, I do not want to say that the mere fact of a woman's fertility being obstructed is intrinsically wrong. Otherwise God would be immoral for creating a cycle which includes infertile periods! What I want to say is that a woman's cycle, on a biological level, is ordered toward fertility, toward the procreation of life. For example, the purpose the follicle stimulating hormone is to cause the maturation of an inchoate egg which is to be released into the fallopian tubes after ovulation. As the egg is maturing, the follicle which contains it releases estrogen which builds up the endometrium to prepare a home for the possible child that is conceived when the egg is fertilized. Furthermore, about day fourteen in a normal cycle, the luteinizing hormone causes ovulation, the egg is released into the fallopian tubes, the follicle where the egg had been is transformed (also by the luteinizing hormone) into the corpus luteum which then secretes progesterone which further prepares the endometrium to receive the child and also causes a change in the mucous around the cervix . . . . . . the mucous becomes thick, sticky, infertile; it will not allow sperm to pass through the uterus into the fallopian tubes where fertilization of the egg occurs. If fertilization does not occur the corpus luteum dies and therefore no longer secretes progesterone, the endometrium is no longer sustained by the progesterone; it is sloughed off, menstruation occurs, and a new, fresh release of the follicle stimulating hormone begins the cycle all over again. However, if fertilization did occur then the zygote floats down the fallopian tube, implants itself in the blood-rich endometrium with hair like roots; these roots (villi) just so happen to produce human chorionic gonadotropin which just so happens to keep the corpus luteum alive which just so happens to continue to secrete progesterone for the three months necessary before the placenta develops to the state where it can secrete a hormone to keep the endometrium intact so that they baby can grow and flourish. My point is that a woman's biological cycle is ordered marvelously, wondrously toward life. Yet, this cycle is not merely a biological phenomena; it is part of who the woman is. The human person does not ‘have' a body. The human person "is an incarnate spirit: a soul which expresses itself in a body and a body informed by an immortal spirit""

- Menstruation

0 likesWomenAnatomy
"Menstrual blood-derived stem cells (MenSCs) are a novel source of mesenchymal stem cells (MSCs). MenSCs are attracting more and more attention since their discovery in 2007. MenSCs also have no moral dilemma and show some unique features of known adult-derived stem cells, which provide an alternative source for the research and application in regenerative medicine. Currently, people are increasingly interested in their clinical potential due to their high proliferation, remarkable versatility, and periodic acquisition in a non-invasive manner with no other sources of MSCs that are comparable in adult tissue. In this review, the plasticity of pluripotent biological characteristics, immunophenotype and function, differentiative potential, and immunomodulatory properties are assessed. Furthermore, we also summarize their therapeutic effects and functional characteristics in various diseases, including liver disease, diabetes, stroke, Duchenne muscular dystrophy, ovarian-related disease, myocardial infarction, Asherman syndrome, Alzheimer’s disease, acute lung injury, cutaneous wound, endometriosis, and neurodegenerative diseases. Subsequently, the clinical potential of MenSCs is investigated. There is a need for a deeper understanding of its immunomodulatory and diagnostic properties with safety concern on a variety of environmental conditions (such as epidemiological backgrounds, age, hormonal status, and pre-contraceptive). In summary, MenSC has a great potential for reducing mortality and improving the quality of life of severe patients. As a kind of adult stem cells, MenSCs have multiple properties in treating a variety of diseases in regenerative medicine for future clinical applications."

- Menstruation

0 likesWomenAnatomy
"Studies by Meng et al. and our group have reported that MenSCs from young and healthy women could increase to one doubling every 20 h supplied with sufficient culture conditions, which was twice as fast as BM-MSCs (estimated 40–45 h). MenSCs have similar phenotypes and properties compared with BM-MSCs, including spindles, classical three-line differentiation, and surface marker expression. A high rate of proliferation was contributed to the high expression of embryonic trophic factors and extracellular matrix (ECM) in MenSCs. A high proliferative capacity is critical for future clinical research because cell-based treatment is usually dose-dependent along with cells from the lower passages; therefore, increasing the yield of the preliminary cells is necessary and considerable in clinical research. In addition, MenSCs have been extensively expanded in vitro and hardly showed obvious chromosomal abnormalities by our group and others. Such a highly proliferating rate and stably genetic characteristic, as well as the apparent pluripotency, suggest that the novel stem cells may exhibit unexpected therapeutic properties. MenSCs are also remarkable for their broad differentiation capacity. Currently, MenSCs can be induced as endothelial, cardiomyocytic, neurocytic, cartilaginous, myocytic, respiratory epithelial, pancreatic, hepatic, adipocytic, and osteogenic parts using appropriate differentiation techniques. Hida et al. found that MenSCs exhibited cardiogenic differentiation in a scaffold culture system. Lai’s team has confirmed that the differentiation of MenSCs into germ cells was induced in the appropriate medium. Similarly, Liu et.al also proved that MenSCs had the capacity to differentiate into ovarian tissue-like cells. Furthermore, our group and Khanjani et al. have shown that MenSCs could differentiate into functional hepatocyte-like cells by checking mature hepatocyte functions. In addition, MenSCs had a potential for differentiation into glial lineages (neurosphere-like cells) by examining the expression of glial fibrillary acidic protein, oligosaccharide-2, and myelin basic protein."

- Menstruation

0 likesWomenAnatomy
"In terms of language, there were no separate words for female genitalia for thousands of years. That was mostly because women were considered pretty much the same as men, only of course flimsier, more poorly designed, and incapable of writing in the snow. As a result, people used the same words to describe male and female organs; the ovaries were considered the female testicles, the vagina a penis, and so on. So how did anyone talk about menstruation, you might wonder? The answer: rarely, and in the vaguest possible terms. Even today, advertisers and manufacturers tiptoe around the actual words, which are presumably too scary and horrible for our ladylike ears. Commercial menstrual products are commonly referred to as feminine “protection”; but this begs the question, protection against what? Against our big, mean uteruses and those psychokiller ovaries? Not to put too fine a point on it, but would you ever call a tissue “nose protection”? Even the expression “ feminine hygiene” implies that menstruation is fundamentally dirty, techy, bad, ad does the expression “sanitary pad.” Depending on your taste, menstrual flow may not be the most aesthetically bewitching substance you’ll hold in your hand, but it’s certainly not inherently unsanitary, either. Yet advertising, by continuing to refer to menstruation in such unrelentingly negative terms, reinforces the same message, over and over: that our monthly flow is a disgusting problem, a hygienic Three Mile Island, something so scary and awful that it definitely needs a solution. And don’t worry, little lad: like a fortune 500 knight in shining armor, guess who’s volunteering to come rescue us from all that blood, that mess, our bodies?"

- Menstruation

0 likesWomenAnatomy
"First, let’s keep in mind that commercially produced femcare-pads, belts, tampons-has been around for only a hundred years or so. Since their launch, there have been noticeable improvements that we, for the most part, applaud madly. Who doesn’t prefer that today’s superabsorbent pads are wafer-thin, meaning that one no longer had to waddle around with the Manhattan Yellow Pages stuffed between her legs? Or that there’s such a variety of tampon styles sizes, and applicators, even a first-timer twelve-year old can generally find something she can insert without the need for heavy sedatives? And yet, even the most sanguine of businessmen realized long ago that there’s ultimately a limit to what kinds of products can actually be made and sold to women when it comes to sopping up a few spoonfuls of blood every month. How many improvements can one make to a pad, anyway? If there’s anything you can figure out about making a pad, say, even more absorbent, with even better wings, or perhaps an even prettier tampon with a glideier applicator, you can rest assured there are many teams of scientists feverishly working on it this very second. Yet dealing with the actual effluent of menstruation is just the tip of the revenue iceberg. Sure, there’s money to be made from pads and tampons; but there’s potentially huge money, monster dollars, to be harvested from tinkering with the actual process itself-something the medical community and pharmaceutical giants figured out years ago."