New blogs

Leherensuge was replaced in October 2010 by two new blogs: For what they were... we are and For what we are... they will be. Check them out.

Tuesday, November 10, 2009

Stress in early life alters genes


Epigenetics is for real and babies should not be separated from their mothers at birth, as is still common in hospitals.


German researchers have demonstrated that even "mild" stress in early life can epigenetically damage mammals organisms, making them more stressed for life.

The experiment consisted in separating mouse pups from their mothers for three hours each day for ten days, while a control group had normal motherly care. This did not affect them nutritionally but the animals must have felt "abandoned" (which for a defenseless newborn mammal is the waiting room of death).

The "abandoned" group were less able to cope with stressful situations later in life and had worse memory than the control group.

The experiment did not stop here: they also analyzed the effects at molecular level. They found that the stressed pups produced high levels of stress hormones, which in turn tweaked the gene responsible for producing one of those hormones: vasopressin. This epigenetic alteration produced more vasopressin than usual through the mice's lives, keeping them perpetually stressed.

Using a drug that blocks vasopressin's effects, they tested that it was effectively this altered hormonal procedure which caused their behavioural and memory problems.

The scientists suspect that this also happens in humans, which are not that different from mice after all and on whom there is strong evidence that abuse and stress in infancy leads to later problems through life.

However I'd like to go a step further and again criticise the modern treatment of newborns in so many hospitals, which are often cruelly separated from their mothers for many hours after birth, precisely when they need most the reassuring company, after the heavy stress of birth. I am persuaded that this practice, along with other mistreatments largely product of the medicalization of birth are one of the causes, if not the main one, behind the growth of psychological disorders (psychosis, depression, etc.) among modern populations in the developed world, most of whom have gone through such unnatural hospital births.

Source: BBC.
.

2 comments:

Ken said...

I've read that the epigenetic influences can go back to ones grandfather Science: Grandfather made me what I am.

Stress to the mother can affect the fetus and sensitise receptors to stress harmones.

It has to be said that there are dangers to a natural birth for older mothers and mothers tend to be older today. Many wealthy women prefer a Ceasarean. ["In Campania reportedly 60% of 2008 birth occurred via Ceasarean sections. In the Rome region, the mean incidence is around 44%, but can reach as high as 85% in some private clinics"].
Benjamin Spock long ago came up with the - incredibly obvious - idea that crying babies should be comforted. There would have to be something wrong with a mother that left a baby alone like that today.

On the other hand some babies will not accept any substitute for their mother and just cry all the time if left with childminders. I know a young mother who had to give up her college course for that reason.

Maju said...

... the - incredibly obvious - idea that crying babies should be comforted.

Obvious, right?

On the other hand some babies will not accept any substitute for their mother and just cry all the time if left with childminders.

I'm a guy, so I don't feel really authorized to tell mothers what to do. But I do feel that motherhood is a 24/7 job for many years and, if the state (society) wants children, it should pay mothers for that job (and train them).

It's nearly impossible to replace a mother for the first years, that's a fact. So we should pay them for that social service.

Many wealthy women prefer a Ceasarean. ["In Campania reportedly 60%....

I thought Campania was the Third World...

It's a joke of course but 60% of women anywhere are not "wealthy".

Not that this changes anything: the high prevalence of unnatural highly medicalized birth and unnatural upbringing cannot be healthy for the children nor the society they have to constitute.