just found out i am (very very unexpectedly) pregnant with number 3. DS is 5 and DD is 3. Both normal pregnancies. Given my now (medically speaking) advanced age, would it be normal to have an amnio as standard? with my 2 DCs, i had the nuchal scan but given my risk of chromosomal abnormalities would now be much higher than it was a few years ago, the risk of miscarriage after amnio is now lower than the risk of having a baby with a chromosomal abnormality. any advice?