"Min fertilitetsdoktor berättade för mig att nya forskningsrön visar att arvet har mindre påverkan på barnets genetiska utveckling än vad man tidigare har ansett och att arvet spelar en allt större roll än vad man förut har trott. Barn som födds via äggdonation tar även upp den bärande moderns genetik. Detta barn för t.o.m. detta genetiska arv vidare till sina barn.Lite mer bättre förklaring om epigeneti:
Epigenetics - The Importance of the Birth Mother
An article about epigenetics that referred to the influence of the birth mother on the genetic make up of a child born from donor eggs. ?..
Genes must be ?expressed? within an individual in order to have an effect.
The same gene or genes can express in a number of different ways depending upon the environment. A gene can remain ?silent? or unexpressed; it can be expressed strongly; it can be expressed weakly, and so on. There is also an entire field of study called ?imprinting? having to do with which gene you ?activate,? the copy you received from your mother, or the copy you received from your father.
The field of epigenetics studies these phenomenon, and popular journalism is just starting to write about it. While the Human Genome Project was still underway, we usually heard genes referred to as ?the Bible? of the human being, as a kind of absolute truth concerning the fundamental nature of the individual.
That is now changing.
In a donor egg pregnancy, the pregnant woman?s womb is the environment. It is her genes, not the donor?s, that determine the expression of the donor-egg baby?s genes.
A donor egg baby gets her genes from the donor; she gets the ?instructions? on the expression of those genes from the woman who carries her to term.
This means that a donor egg baby has 3 biological parents: a father, the egg donor, and the woman who carries the pregnancy.
The child who is born would have been a physically & no doubt emotionally different person if carried by his genetic mother.
In horse breeding for example, it?s not uncommon to implant a pony embryo into the womb of a horse.
The foals that result, are different from normal ponies. They?re bigger. These animals? genotype ? their genes ? are the same as a pony?s, but their phenotype ? what their genes actually look like in the living animal ? is different.
The implication of epigenetics is that the child inherits characteristics from the woman who carries the child even if the original DNA comes from a donor egg. In other words the birth mother influences what the child is like at a genetic level - it IS her child."
