Posted on 08/21/2012 11:10:29 AM PDT by Maelstorm
Pregnancy loss is a common and painful condition for gestational women, accounting for 25-40% of total pregnancy, having become a serious social-medical issue worldwide. Animal studies and clinical investigations have indicated that the cause of many mid-term miscarriage/abnormal pregnancy has been seeded very early during the onset of embryo implantation. Epidemiological study also showed that maternal stress at early pregnancy is strongly associated with various complications during ongoing gestation. However, whether and how the process of embryo implantation is affected by environmental factors such as stress induced sympathetic activation remained elusive. Considering the mammalian uterus is an organ with extensive sympathetic innervations, the research group leads by Prof. Enkui Duan at Institute of Zoology, Chinese Academy of Sciences hypothesized that it is possible that around the time of embryo implantation, stress-induced sympathetic activation may directly affect embryo-maternal interactions through adrenergic receptors, therefore affecting the quality of ongoing pregnancy.
By using mouse model, the research group found an unexpected, transient effect of β2-Adrenoceptor (β2-AR) activation (Day4 postcoitus) in disrupting embryo spacing at implantation (without changing implantation timing), leading to substantially increased mid-term pregnancy loss. In vitro and in vivo studies demonstrated that the transient β2-AR activation abolished normal preimplantation uterine contractility, without adversely affecting blastocyst quality. The contractility inhibition is mediated by activation of cAMP-PKA pathway and accompanied with specific downregulation of lpa3, a gene previously found to be critical for uterine contraction and embryo spacing. These results recapitulated the concept that “on-site” intrauterine embryo location mediated by concerted uterine contraction is crucial for successful ongoing pregnancy.
(Excerpt) Read more at rpb.ioz.ac.cn ...
AKIN WAS RIGHT.
“We” do? Who are “WE”?
You people HAVE to be kidding.
“We” do? Who are “WE”?
You people HAVE to be kidding.
Extreme stress can also delay ovulation, which may prevent pregnancy following the traumatic event, but allow pregnancy to happen unexpectedly somewhat later in the cycle from another procreative act. (My wife and I learned this after the fact from our fourth child).
Uh, the PROBABILITY of pregnancy during a rape may be somewhat lower, but it’s nowhere near ZERO. anyone who thinks pregnancy after rape doesn’t happen is an idiot.
Uh, the PROBABILITY of pregnancy during a rape may be somewhat lower, but it’s nowhere near ZERO. anyone who thinks pregnancy after rape doesn’t happen is an idiot.
What’s your point?
I am not a mouse.
I’ve read several pro-life articles about rape victims who decided to keep the resulting offspring. The above article doesn’t establish a 100% scenario of protection for the victim. Only idiots are pushing this theme.
you really need to pay attention to what was said. If a woman experiences an actual rape, there are times when her body will react differently and she will suffer a spontaneous abortion (miscarriage) or she will not be impregnated at all.
nowhere does anyone say that she cannot become pregnant, we all know that she can. That having been said, do we then execute the child for the crime of its father???
sheesh
A woman, or a Chinese mouse?
It reminds me why there are only a very few Freepers I trust with science. Also one of the reasons the Global Warming threads here are mostly a joke.
Its not even worth getting into it here, I give up.
That isn’t “prevention of pregnancy”. It’s “messes up the pregnancy and causes a spontaneous abortion”.
If the argument is that we don’t need to allow abortion for rape victims, because if they are stressed out and sad enough long enough, they will self-abort, then I guess you have us there.
Oddly, there are many living people who were conceived in rape, where I guess their mothers didn’t stress enough.
We, refers to folks familiar with the research and statistics on completed rapes and resulting pregnancies, which you may not be interested in.
There are many statistics. Of course, you can’t find an easy apples-to-apples comparison. For example, overall, you are slightly more likely to end up pregnant from a consumated rape than from a consensual consumated sexual encounter.
But that is in part because protection is more often used by those in consensual sexual relationships. And because the statistics are years old, and don’t take into account the recent practice of using post-rape abortion morning-after pills to stop pregnancy resulting from rape.
It is clear that stress has some impact on the ability to get pregnant. While some here were laughing about that yesterday, most of us who opposed Akin’s comments weren’t making that mistake. The problem is that stress does not “greatly reduce” pregnancy. Even Wilke, cited here yesterday in support of the concept, chose to believe it had a 50% reductive effect. Large, but not orders of magnitude.
Unfortunately, that is somewhat mitigated by the virtual certainty that the rapist isn’t using condoms, and the good chance that the woman wasn’t prepared and didn’t therefore have her own protection deployed. And of course, the man wasn’t trying to choose times when the woman was less likely to get pregnant.
Of course, the fact that we are even TALKING about this is the reason many of us were upset at Akin’s comments. It was an absurd choice of argument, it muddied the waters for the legitimate pro-life argument, and it distracted from the real issues. It allowed the liberals to smear all republicans with the false charge that we don’t think women can get pregnant from rape.
It also fed right into the “war on women” meme, with his use of “legitimate rape”. It reminded people of Ryan’s vote for the “forcible rape” bill — which actually can be explained, but is again a distraction and hurts us with women.
If we are going to argue about abortion, let’s keep it simple — abortion is wrong because it kills human beings, and we don’t kill innocent people to fix criminal actions.
anyone who thinks pregnancy after rape doesn’t happen is an idiot.
Just who has been suggesting such? The suggestion that it happens frequently is another idiotic suggestion, and I know you aren’t suggesting such.
Its not even worth getting into it here, I give up.
...and I contend that based on your home page it is incumbent on you to never give up, having come from the dark side into the light. There are those listening and watching for wisdom if it proves to be.
The point is Akin is an idiot. Raped women do get pregnant.
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