Antenatal Care

Question 1

describe how downs syndrome is screened

Answer 1

in the 11-13+6 week scan Nuchal Thickness is assessed

If It is thick more likely to have downs sydrome

triple test is done in second semester. B-hcg, AFP, and unconconjigated estriol are measured

High B-HCG and low estriol and low AFP= more likely to be downs

High AFP= Neural tube defect

All low= trsiomy 18, Edwards

If risk is over 1/250 then amniocentecis is offered. Although it has a miscarriage rate of 1%

Question 2

describe the timeframe of the main events of antenatal care

Answer 2