In dealing with the subject of Vulcan Pon Farr, it is mentioned that both go through this,
yet it is only the males that it is described in detail. What would the behavior and symptoms for a female be,
and how would they be diluted through mating with human or betazoid?
 
While the reactions of the male Vulcans through Pon Farr have been well-documented, it is true that we are left in the dark when it comes to the females. Since there is no documented source to provide further information, anything further said is in the realm of conjecture.
 
To speculate about the nature of pon farr in the female, we have to think about what we know about it in the male. It seems to occur according to some sort of internal clock, and does not follow seasons, or phases of the moon or whatever since it hits only Spock in Amok Time and none of the other vulcans. So, it's like a recurring 11-day puberty rather than a usual animal "mating season." (Of course, it may be synchronized with something on Vulcan, like the sun. Maybe Spock fell out of synch being on the Enterprise. Maybe he needs to get some kind of special pon farr lamp in his quarters that can simulate the phases of the vulcan sun.) If it's a personal thing, when it hits, then how do you find a partner? Maybe the person in pon farr sends out some sort of hormonal signal, like pheromones, that members of the opposite sex respond to. Maybe they also go into pon farr, if it's close to their "natural time" or maybe the women ovulate. However, if we assume that female vulcans have an ovulatory cycle like that of human females (which can respond to external stimuli: There was an experiment in which the menstrual periods of group of women were synchronized, through scents, if I remember correctly), they are only fertile for a few days out of the month. If a woman responds to a male's pon farr when it's the wrong time for them or is forced to have relations, no pregnancy can occur. Maybe Saavik's response to the young Spock in STIII can give us some clues. Wasn't there some scene (later deleted) that suggested that his pon farr was somehow "dealt with?" On the other hand, what if females ovulate only every 7 years and are only fertile for 11 days? In that case it would make sense to have everyone sychronize to increase the chances of fertilization (like salmon), but that doesn't seem to occur. Also are vulcan males "fully functional" when out of pon farr? With this pon farr stuff, I'm surprised that there are any vulcans still around. Most animal species makes all individuals fertile at one time or makes everyone fertile most of the time (as in humans). To make each person fertile only some of the time seems like a bad strategy. Any ideas about how this kind of thing evolved. The point that Vulcans would be fertile only for a few days every seven years has been bugging me too. I would rather assume they are technically fertile all the time, to maximize the chance of reproduction.
As for the females, if they have some sort of biological clock too, it would better tick synchronously with that of the males. However, I can't imagine that all Vulcans, females and males, have Pon Farr at the same time every seven years, and in "Amok Time" this was not the case. The cycle is almost defintely determined by life time and not the absolute calendar date (see also ST III). So how should males and females ever come together if the chance of being in the Pon Farr at the same time is virtually zero? The answer is that they are fertile all the time, and that females possibly don't have anything like Pon Farr at all. I'd guess that the Vulcans are fertile the entire time, and that the Pon Farr cycle only started once they got into the Logic stuff. It could be their way of "letting off steam" or something like that-- depending on an individuals emotional control and stress levels, their reaction could vary.
And what about the Romulans? Do they  have the Pon Farr too, since they are the same race in evolutional dimensions. The fact that pon farr doesn't happen in Romulans despite the "races" or subspecies having diverged only about 2000 years ago suggests to me that it's a psychological rather than a strictly physiological phenomenon. Or maybe they supress fertility somehow with drugs. I agree it's likely that the Vulcans are naturally fertile all the time, as apparently all the other major races are. All this makes me think that vulcans must be an extremely stressed out race. You'd think they would've developed ways other than uncontrollable sexual activity to channel or sublimate their stress.
While I've never seen Vulcans kill people at will, they can subvert their largely pacific nature into the belief that violence is a justiable means towards a specific end. For example, remember the Vulcan Maquis who purchased illegal arms from Quark in an episode of DS9? She was Vulcan to the core, except that she turns to violence as a Maquis follower. But in all four series, there has never been even a hint that Vulcan was anything but a paragon of peaceful coexistance. Perhaps its just the Vulcan veneer, but there's no reason to think the Vulcans regret the tradeoff of intense sexual disorientation once every seven years for the logical clarity they cherish so much. While this is not directly related to Pon Farr, it's just an observation on the behavior of Vulcans in general.
Well, current information states that it occurs every 7 years with no reference to gender. Starting at the betrothal at the age of 7, but no specifics are mentioned about how ponn farr is dealt with at that age other than the betrothal (one fears to ask, I would think, of how to sate such an appetite in such a young person). Then it is again not stated how it is dealt with at the age of 14, but that at the age of 21 they are to wed. From this time on, they help each other through the pon farr as only we can imagine.
What happens if in a mixed marriage, if the child isn't betrothed as tradition dictates? We saw part of this in an episode of Voyager, and the male seeks out the affections of the one that he has a crush on at the time. I don't recall how they medically helped Tuvok, but he was going after the Klingon babe at the time.
In keeping with the theme of the programs, I would think that it happens to women as well, but with a bit more control and dignity. Since it is insinuated that the drive stems from an urge to mate and that they'll kill to achieve the goal if any try to stop them, I would think that the females would be driven to do the same, but slightly less violent unless confronted or jealous of a potential rival.
A woman would be more likely to try seductive attempts first, and become uncharacteristically sexy in their dress and behavioral patterns at least towards the object of their desires. This may be dampened in mixed races as others races might allow the individual slightly more expression, thus less repression, so less to release during the process. It might also vary the timing more, thus being less predicable in the timing in mixed races.
The issue of mixed race is just as interesting for Vulcans as it is for Betazoids. While we've seen Spock struggle to purge any Terran influence on his thought, he ultimately must reconcile both sides of his heritage. What this has on the import of pon farr is hard to say, but it evidently doesn't do much to ease the pain and emotional trauma.
Vulcans may be the result of species transplanting, as hinted in TOS "Return to Tomorrow". Perhaps Pon Farr is a cruel joke played on them by their transplanters? Or then something engineered into them out of necessity when the transplanters wanted to adapt the species to a desert climate?
Perhaps Vulcans originally had a seven-year cycle of fertility but only mild Pon Farr symptoms. In relatively lush environments like Romulus or Mintaka, populations would be large and would intermingle freely, making finding mates relatively easy. Instead of pheromones, the mates would be found with the help of primitive telepathy.
The desert environment did not allow for intermingling. Instead, it forced Vulcans to live in small, isolated communities beyond telepathy range, communities that had to fiercely fight their neighbors for the scarce resources. Vulcans had to learn to preplan the matings carefully, selecting people with matching cycles in advance and making sure they stayed together until the first true fertility cycle at least (this would be after puberty and the age of 14, but the matching would be performed two cycles "too early" to be on the safe side).
Gradually, the telepathic bond used for this grew in intensity beyond the original norm, and as a side effect, males began to show dangerous "withdrawal symptoms". Ultimately, they would die if they missed a mating. Females for some reason never fell victim to this development. But males could telepathically project the rage to innocent bystanders in some cases, like in the Voyager episode.
Also, a ridgeheaded subspecies of Vulcans never developed quite as intense a form of telepathy. Their Pon Farr was milder, closer to the original norm. Still, they fought just like the smoothheads for the scarce resources in the desert, against long-lived opponents. The cycle of violence ultimately drove Vulcan into the brink of a disaster, solved by Surak's teachings of logic and the departure of his opponents to Romulus. Most of these opponents were of the ridgehead racial group, explaining the Romulan ridges and apparent lack of Pon Farr or telepathic skills.
For the Vulcans staying behind, the straightjacket of logic just made the Pon Farr more intense psychologically. Perhaps the "mate or die" problem only emerged after the adoption of Surak's way of life. Romulans, males and females alike, could continue with their milder "female" type of Pon Farr, and in their lush planet could freely choose mates in suitable stage of the fertility cycle. They would have learned the fierce fighting mentality from Vulcan's deserts, though, and would continue this in their new world.
What about this? Pon Farr = 7-year ovulation cycle, exaggerated out of proportion due to the transfer to a harsher climate and smaller, more isolated communities, and with unexpected complications in men but not in women. Romulans and Vulcan women = original-style vulcanoids; Vulcan men = victims of both the intensified telepathic effects, and of Surak's lifestyle guidelines.
 
I also believe that the Vulcan species are fertile at times other than ponn far. IMHO they also mate at will. We have learned that Vulcans are highly emotional and that is why they control them. If we accept TAS in "Yesteryear" Vulcan children can be cruel and lack compassion. The control has to be learned and most likely not completed until they are adults. Spock in "The Cage" and the flashbacks in "The Menagerie" is smiling. And he didn't stop yelling on the bridge until about the third or fourth episode. Mid first season was when he mellowed out to be the Spock we are familiar with. Sarek showed alot affection for Amamda (you could say though it was her influence). I do speculate that most Vulcans do share PRIVATE affection within a married relationship. I degress and say that the married state in itself is an emotion institution, or else the Vulcans would have another way of companionship, pooling resources, or reproduction.
I think that Pon Farr is a release from controlling emotion. Here we have all the negative aspects that Vulcans rejected. 1) Violence 2)Unbridled sex 3) Divorce without a real logical reason (although T'Prings were almost reasonable) 4) Temper tantrums