women have mensual discharge as a sign of maturity and fertility. What type of mechanism exists in animals and birds?
208671
It varies greatly from animal to animal. Smaller mammals, such as cats, have a somewhat similar discharge following a period of being "in heat". But many animals exhibit mechanisms with no resemblance to the human counterpart. Snakes, for example, undergo a prolonged period of molting, shedding layer after layer of skin until they occasionally die of exhaustion and malnutrition, or burst into flame. Many species of bird, chickens included, lay eggs upon reaching maturity, even when there is no mate to fertilize them. This, however, is widely regarded as a sin in the animal kingdom, and is condemned by the bird pope.
633449
It's a pain, It happens when the females egg isn't fertilized, it's removed from the body and than a new one is put in it's place.\n\nIf fertilization and pregnancy do not ensue, the uterus sheds the lining, culminating with menstruation, which marks the low point for estrogen activity. This manifests itself to the outer world in the form of the menses (also menstruum): essentially part of the endometrium and blood products that pass out of the body through the vagina. Although this is commonly referred to as blood, it differs in composition from venous blood.
253875
Well, it's like this:\n\nThere are four phases of a woman's menstrual cycle:\n-menstrual phase\n-proliferative phase \n-ovulatory phase\n-secretory phase\n\nDuring the proliferative phase, which occurs between the end of a woman's menstrual period and ovulation, the uterine endometrium undergoes a process of growth as a result of the stimulation of ESTROGEN.  (key word, estrogen)\n\nDuring the ovulatory phase, the Graafian follicle in the ovary ruptures and releases the ovum around 14 days after the start of menstruation.  The concentration of ESTROGEN is very high in the blood and it stimulates ovulation.  The blood vessels of the endometrial lining ENLARGE and GROW and some secretory cells are formed.\n\nIn the secretory phase, b/w ovulation and onset of menstruation, the endometrium is under the influence of both progesterone and ESTROGEN, increases in size and becomes thick, the endometrial glands become enlarged, and the blood vessels become coiled and enlarged.  (this all caused by levels of hormones)\n\nIf, during this phase, the ovum becomes fertilized and implants itself in the lining of the uterus, the CORPUS LUTEUM (a yellow, progesterone-producing mass of cells that form from the egg after ovulation) somewhat "senses" fertilization and remains to secrete progesterone which helps the embryo grow within in the uterus.  If the ovum is not fertilized, the corpus luteum disintegrates and the progesterone level falls sharply.  Fourteen days later, the endometrial lining, all those enlarged blood vessels, cell debris are discharged.  (menses) \n\nBasically that corpus luteum is kind of like a "radar detector" for changing hormone levels and sperm.  When that radar goes off after sensing sperm, the uterus essentially "slams on the brakes" and stops.  (Much like we tend to do when we see that state trooper hiding behind those bushes on the highway)  Growth of an embryo begins.  \nIf we don't hear a beep, we just keep on driving.  And the cycle continues.\n\nIt all seems so intriguing, the way the whole process works, that one can't help but marvel at how mysteriously the Lord did His work in creating us.  No man could ever have devised His plan for our cycle of life.  It's amazing to even think about.  \n\nHope this helps.
277478
its depend but its been medically proven that women is 70 % more horny then men if she dont get her montly period (it helps to release her hotness) she jump around d_i.c_k to D all over world
380401
Here's a great link to an article all about the menstrual cycle. Happy reading! :)\n\nhttp://www.webmd.com/hw/healthy_women/tn9931.asp
495555
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.
25449
There is an evolutionary difference between animals which menstruate (can breed any time of year, subject to monthly periods) and those which have a finite breeding season.
231599
I had a girlfriend who had these types of organisms which is why I did some research...\n\nIn 2002, Emanuele Jannini of L'Aquila University in Italy showed one explanation for this phenomenon as well as for the frequent denials of its existence. Skene's gland openings are usually the size of pinholes, and vary in size from one woman to another, to the point where they appear to be missing entirely in some women. If Skene's glands are the cause of female ejaculation, this may explain the observed absence of this phenomenon in many women. Retrograde ejaculation , where the fluid travels up the urethra towards the bladder (observed in 75% of test subjects) could also account for the observed absence.\n\nEjaculation in women seems to be aided or caused by stimulation of the area of the vagina known as the Gräfenberg spot (often simply known as the G-spot). The content of the ejaculated fluid is either all urine, all glandular secretion, or a combination of both.\n\nStudies of the fluid ejaculated through the urethra have shown a different chemical composition than urine although a trace of urine may also be present. Glucose, prostatic acid phosphatase, and prostate specific antigen appear in female ejaculate along with lower levels of urea and creatine than found in urine.
349969
Many animals mate in the fall to reproduce in the spring when temperatures are moderate and food is abundant.  This is triggered by day-length.  This increases the likely-hood that the offspring will survive.
103803
I'll assume that by "poopers" you mean the entire rear end (not just the rectum).\n\nIf that is the case, it is entirely genetic.\nAs we evolved, we have viewed the rear end as the primary sexual indicator.  Mounting from the rear is the time-tested method of intercourse.  Thus, when a female flashes her naked rear, the males are instantly sexually attracted and arroused.\nThat we have evolved to stand up straight, this meant we had to have sexual indicators in the front, as well.  What resembles the cleavage of the rear?  The breasts!  So, human females developed enlarged breasts...despite not being pregnant or lactating (in apes, they are flat unless one of the two).\n\nI hope this helps. If you meant the rectum instead of the entire rear end, I cannot help you.  Be sure to use soap.
580692
A period, is the bodys way of letting go of an egg that wasn't fertilized.
227481
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.
649952
females actually do produce pheremones; it is responsible for the synchronization of menstrual cycles
515509
The condition you are explaining is a nymphomaniac which in terms means addicted to sex....  \n\nGod your birds lucky... im a total nymph and mybloke so not...
286788
Yes, they do.  It's called "estrus, but is often referred to as being "in heat", especially when referring to a household pet.
482573
women have lots of lubricating glands in and around their vaginas.  when they produce alot of fluid it can accumulate inside of her before orgasm.  during orgasm the muscles in the vagina can tighten and even spasm.  this tightening forces fluid out.
476409
white discharge that has no smell is normal and usually happens mid cylcle and is an indicator that you are ovulating.