After all , part of the fetus is not of her genes,therefor a foreign matter
2006-12-23 07:31:52 · 10 answers · asked by Einstein 7 in Science & Mathematics ➔ Medicine
because nature has it set up that way. otherwise there would be no human race.
2006-12-23 07:34:16 · answer #1 · answered by Luvbuz01 5 · 2⤊ 1⤋
The fetus develops inside a closed bag of membranes called 'fetal membranes'As a result, the fetus's cells never come in contact with the mother.
Even the fetal blood and maternal blood never come in direct contact with the fetus.So the immune system cells never have a chance to encounter a fetal cell.
Sometimes,fetus can be rejected!
2006-12-24 10:07:57 · answer #2 · answered by Rohan 2 · 0⤊ 0⤋
The truth is that, it does happen to some women. But the body doesn't reject the fetus, because it is related and formed by the same genetic code, that your body is made of. Occasionally something goes wrong - a rejection happens very rarely, and it dissolves the pregnancy. This is due to some temporary abnormality. I've also heard that it can happen due to change in rh factor.
2006-12-23 15:37:11 · answer #3 · answered by thewiseone 3 · 0⤊ 1⤋
It's because the egg from which half the genes of the fetus came from the mother....but actually there is a rare condition where the mother's body rejects the fetus...i think its called erythroblastosis fetalis, wherein the mother's body develops antibodies against the fetus...
2006-12-23 15:48:56 · answer #4 · answered by smileytulip_jeh 2 · 1⤊ 1⤋
Recent evidence suggests that the mother's immune system doesn't "realize" that the fetus is foreign even though it gets half its genes from the father. Yet just as Nobelist Peter Medawar said when he first raised this question in 1952, "the verdict has yet to be returned."
So from that, there is still no clear cut answer.
2006-12-23 18:44:04 · answer #5 · answered by Anonymous · 0⤊ 1⤋
Because the relationship is symbiotic..the fetus is surrounded by a placenta that is made up of the woman's genes..its growing in that, inside her uterus, not just in her uterus unprotected. I suppose if it was, then the body would see it as an intruder...
2006-12-23 15:37:24 · answer #6 · answered by every woman 3 · 0⤊ 0⤋
Some pregnancies do get rejected if it doesn't form properly in the uterus. Miscarriage.
2006-12-23 18:34:06 · answer #7 · answered by Mary B 2 · 0⤊ 0⤋
Instinct. If a mother didn't have an instinct to keep her child then there wouldn't be any of us here. The reproduction cycle goes on and on.
2006-12-23 15:37:03 · answer #8 · answered by Anonymous · 0⤊ 3⤋
Sometimes that happens, truly.
Love is the key to making babies.
2006-12-23 15:39:25 · answer #9 · answered by Anonymous · 1⤊ 1⤋
women were designed to have babies. thats like asking "how was my birth a success?" do we need to have the where-do-babies-come-from talk?
2006-12-23 15:40:37 · answer #10 · answered by Anonymous · 0⤊ 1⤋