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Semen Is An Antidepressant

Attention, Ladies: Semen Is An Antidepressant
Vaginal exposure to semen elevates women's mood.

by Michael Castleman
Published on January 31, 2011

Perhaps you're familiar with the McClintock effect, the observation that when groups of reproductive-age women live or work together (in college housing, the military, all-female workplaces, etc.), over time their menstrual periods tend to become synchronized. The accepted explanation is that the women detect each others pheromones, subtle scents that each of us produce, and somehow these only-faintly aromatic but powerful compounds influence the women's hormones and make their menstrual periods arrive around the same time.

But at the State University of New York, two evolutionary psychologists were puzzled to discover that lesbians show no McClintock effect. Why not? Gordon Gallup and Rebecca Burch realized that the only real difference between lesbians and heterosexual women is that the latter are exposed to semen. They speculated that maybe semen chemistry has something to do with the McClintock effect. But if that were true, the vagina would have to absorb compounds in semen that affected the women's pheromones.

Semen is best known for what's not absorbed by the vagina, sperm, which swim through it on their way into the fallopian tubes where fertilization takes place. But sperm comprise only about 3 percent of semen. The rest is seminal fluid: mostly water, plus about 50 compounds: sugar (to nourish sperm), immunosuppressants (to keep women's immune systems from destroying sperm), and oddly, two female sex hormones, and many mood-elevating compounds: endorphins, estrone, prolactin, oxytocin, thyrotrpin-releasing hormone, and serotonin.

Vaginal tissue is very absorptive. It's richly endowed with bl**d and lymph vessels. Given vaginal absorptiveness and all the mood-elevating compounds in found in semen, Gallup, Burch, and SUNY colleague Steven Platek wondered if semen exposure might be associated with better mood and less depression. They surveyed 293 college women at SUNY Albany about intercourse with and without condoms, and then gave the women the Beck Depression Inventory, a standard test of mood. Compared with women who "always" or "usually" used condoms, those who "never" did, whose vaginas were exposed to semen, showed significantly better mood--fewer depressive symptoms, and less bouts of depression. In addition, compared to women who had no intercourse at all, the semen-exposed women showed more elevated mood and less depression.

Meanwhile, risky sex is usually associated with negative self-esteem and depressed mood. Among college women, risky sex includes intercourse without condoms, so we would expect sex sans condoms to be associated with more depressive symptoms, and more serious depression including suicide attempts. However, in the Gallup-Burch-Platek study, among women who "always" or "usually" used condoms, about 20 percent reported suicidal thoughts, but among those who used condoms only "sometimes," the figure was much lower, 7 percent, and among women who "never" used condoms, only 5 percent reported suicidal thoughts. (This study controlled for relationship duration, amount of sex, use of the Pill, and days since last sexual encounter.) So it appears quite possible that the antidepressants in semen might have a real mood-elevating effect.

Finally, recall that in addition to antidepressant compounds, semen also contains two female sex hormones, follicle-stimulating hormone (FSH) and luteinizing hormone (LH). FSH spurs egg maturation in ovary. LH is involved in triggering ovulation. Why would semen contain compounds that encourage ovulation? From an evolutionary perspective, this makes perfect sense.

Consider our closest biological relatives, the chimpanzees. Chimp semen contains no FSH or LH, but ovulating females develop a red buttocks, clearly signally reproductive readiness. In contrast, human women have concealed ovulation. Men don't know when women are most fertile. Compared with men whose semen lacked ovulation-triggering hormones, those whose semen contain these hormones would gain a small reproductive advantage. Their semen would encourage ovulation, and their sperm would be more likely to fertilize eggs.

Now, I'm not advocating that reproductive-age people shun condoms to elevate women's mood at the risk of unplanned pregnancy. But this effect might come in handy for women over age 50, who are experiencing menopausal blues.

I'm fascinated by the chemical complexity of semen. Until recently, scientists believed that its sole purpose was to nourish and protect sperm on their way to fertilization. But now it appears that semen spurs ovulation and makes women feel happier. That might explain why many women report increased interest in sex around the time of ovulation.

Source:
Bering, J. "An Ode to the Many Evolved Virtues of Human Semen," Scientific American, Sept. 22, 2010.
Posted by pixel_walks 4 years ago
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8 days ago
Unless you're my wife. ;)
Would like to see more money thrown into this subset of research.
Thanks for the read.
10 months ago
You had us at menstrual cycle
10 months ago
Some very interesting notions.
1 year ago
I did not know that!
1 year ago
good read
1 year ago
thx 4 making science fun!!!
2 years ago
Seems to work for my wife
2 years ago
HOWEVER...the theory is that semen is an antidepressant. I would have to concede that this may be the case. --In women. What is it about sex that would make the male happier. Could it be that it is just the attention that he gets from his partner? I think that sex is a happy activity for both men and women. This is my contention. Thus spake Lazarus Long.
2 years ago
I'm not sure I'd buy that last statement. It assumes that those interested in sex just before ovulation are sexually active at that time. I've known women who were not having sex at the time of ovulation who reported interest in sex. M2oral was being facetious, but he has a point, in that it would be interesting to see if women who had exclusive oral or anal were depressed or happy. I would postulate that they were more happy because they were having SOME kind of sex. I would think that endorphins would have a greater degree of cause for happiness, and they are produced in the brain. Risky sex, ie sex without condoms OR casual sex could still be reasons why the woman has negative self esteem and/or depressed mood. --But then that's just my opinion, and what do I know?
3 years ago
um....
3 years ago
I'll be happy to write you a prescription for my antidepressant, dear. Your health insurance should cover all but the deductible...

Interesting they don't mention whether the effects are also present when semen is taken orally rather by vaginal suppository - perhaps we need another study? LOL
3 years ago
The things you can learn from porn are amazing...
3 years ago
Plus its only five calories per serving!
3 years ago
NOW tahts how you qualify "cum is GOOD for YOU"..
3 years ago
No wonder my ex craved my cum inside of her all the time.
pack_howi...
retired
3 years ago
neat!
3 years ago
Who knew?
3 years ago
that is very interesting & good info
mikesthic...
retired
3 years ago
I heard this on the radio the other day.
3 years ago
that sounds interesting!