Why do women's cycles align when they live in a group? Is this from the caveman days?
340393
Actually, you are just about right. I heard it's a natural adaptation from the hunter-gatherer times. Tribes had to move often, in order to follow the animals in their migrations. Pregnancies meant they had to stop for the mother to give birth. So, women's cycles were aligned in order to save time. The process is triggered by hormones. When one woman becomes fertile the others will follow.
496795
This is a perfectly normal occurance. What has happened is that you and your roomates cycles have synchronized with one another. The way in which this happens is the result of pheromones. Let me explain. A pheromone is any chemical or set of chemicals produced by a living organism that transmits a message to other members of the same species. There are alarm pheromones, food trail pheromones, sex pheromones, and many others that affect behavior or physiology. Although the existance of human pheromones is questioned, except in the case of menstrual synchronization. The best-studied case involves the synchronization of menstrual cycles among women based on unconscious odor cues (the so called McClintock effect, named after the primary investigator). This study states that there are two types of pheromone involved: "One, produced prior to ovulation, shortens the ovarian cycle, and the second, produced just at ovulation, lengthens the cycle". So as a result of the pheromonal cues, your periods will synchronize.
93012
Maybe your hormones are messed up.
98496
They tend to be a little more "Right Brained" than most women. They think in a more logical, linear pattern; while women think in circles.\n\nThey fail to take into account the increasing number of cold, calculating b!tches like me.
1185371
wow, u sure picked a great name....biology's biology, and some guys aren't picky, they'll do anyone that'll do them....some women are cut from the same cloth, there, some ppl are more promiscuous than others...don't hate people, find someone who's on the same channel u are. There's lots of good reasons for being a little more conservative rather than spreading your genes and leaving your jeans all over town...maturity and responsibility are right up there in the top 3, along with unwanted pregnancy, STD's, your reputation, etc etc etc...
845676
No darling:) Don't worry, ususally the menstral cycles doesn't become stable(as far as length between and days on) until you are in your twenties, or after your first child. your body is still growing and developing and getting used to the rush or new hormones. Many things can effect your monthly cycle.For example, your body fat percentage. If you very athletic, thin, with very low body fat you will always have a shorter more irregular period. Also if you have another feamle in your household, for some reason unknown to science. Women that live together will eventually have their menstral cycles together. Don't worry , unless you have severe cramping or bleeding,colored discharge(white or yellow), or foul odor. These are all reasons to contact your school nurse,doctor, or your parents. G'luck and be safe
1051591
Don't worry about it. It is probably that you have lots of contact with a woman whose cycle is shorter than yours and you are being drawn to her cycle. This is a normal, natural phenomenon. Don't worry.
906392
Here's one theory:\n\nWomen who work or live together tend to get their menstrual cycles in sync. That curious phenomenon known for years by scientists and many ordinary folk, has long been suspected as an indication that humans, like insects and some mammals, communicate subtly by sexual aromas known as pheromones.
942058
Generally yes. Woman are making great strides, but still in process. We are too understanding of men, but even that is changing some. There are ancient tribes, I read about [think Nat'l Geog.], where the women were actually the leader - a maternal society. Another one the men and women actually were pretty equal in power within tribe politics. Pretty cool. So both are possible for people, naturally. [Think these were in New Guinea?]
807066
I've certainly practiced during menstruation.  I do avoid inversions (headstands, shoulder-stands, backbends) during that time, per the advice of my instructors.  I can't recall exactly how it was explained to me, but it had something to do with avoiding asanas that make blood rush to your head.
1140350
Synchronous menstruation was first described in 1971 by researchers McClintock and Stern. It is a proven occurrence, borne out by additional studies. Though they are still unclear as to exactly why it occurs, the most widely accepted theory is that it is due to pheromones. Others think it's due to some evolutionary carry-over from prehistoric times, when it was common for men to take multiple mates to ensure the survival of the species, but the pheremone theory makes more sense... \n\nSource(s):\nMcClintock, M. K. (2000). Human pheromones: primers, releasers, signalers or modulators? In K. Wallen and J. Schneider (Eds.), Reproduction in Context: Social and Environmental Influences on Reproductive Physiology and Behavior. MIT Press. Pp. 355-420.\n\nMcClintock, M. K. (1998). Whither menstrual synchrony? Annual Review of Sexual Research, 9, 77-95.
369935
Because women have periods......bleeding monthly lowers hematocrit.
552303
HEY!! Its called hormones!! I do the same thing with my period. My friends joke that i've got the cleanest house in the world, and they also seem to invite me over everytime my PMS is about to start. Hmmm..... maybe its time to get some new friends!!!
990592
I am not positive what you are asking.  Are you asking if it is human nature for a woman to want a husband to be social and a man to want a wife to be more of a home-oriented person?  If so...\n\nAbsolutely not. It is true that people who grow up together in groups(we all do--that's what your community is, a group) often have alot in common, but there is still a good deal of variety everywhere.  Also, it should be remembered that what people want and what their group allows or encourages them to do are not always the same.
53654
well hormones are different at this time... and periods become unpredictable... if u dont know if u are in menopause or not talk 2 ur doctor...
1134105
O.k. some of the guys possibly reading this are not likely to like my answer, but, here goes.\nI believe that women are most definitely "equal to" men in every single way, (except when it comes to physical strength, and that's a general statement)- and superior to (or more "evolved", if you prefer), in other ways. (That is the part men aren't going to like to hear!)\nAnthropological studies have thus far traced the existence of "man" back to a an AFRICAN WOMAN. Women were also the first to learn to "communicate" with one another (referring to humans in general). Women have highly developed social skills right down to this day, and, in my opinion, have developed many skills critical to survival that men just haven't developed much of at all. (They haven't had to. Women have been taking care of them since human beings first appeared on earth!)\nWe, as women, bring forth new life onto this planet- (sure, with the sperm donation of men)- but it's the women who generally care for and raise and teach and nurture these new lives. We don't get half the credit we deserve for our abilities and our intellect, but that is where a big fault with women does apply- because we are generally not motivated by our egos, we have allowed ourselves to take this "back seat" in society, figuring we could profit in other ways- or keep the peace (which is also very important to us). However, now we live in a "man's world", and don't seem to have woke up to the fact that it is just as much our own doing- our own "fault"- as it is men's. It's time for change. It's time for women to band together and be heard. We are not a "minority" in number, and in this country (because we live in a democratic society)- we have the opportunity TO BE HEARD and our "votes to count"- but not enough women seem to care. That needs to change. We will continue to hold this place in society until we (as a whole) accept nothing less than what we deserve, and that is respect- but it begins first with ourselves. \n\nWe need to learn to respect ourselves. If we do not, how can we expect anyone else to do so, and who else then do we have to blame?
575447
it has nothing to do with gender.  People lie period. It has to do with integrity,  You either have it or you don't.  There are also situations where a person in a relationship becomes a minimizer or a maximizer,.  If someone doesn't want consequences to their actions, they will minimize and the other will automatically maximize.