1)Double marker is done between 8-12 weeks of pregnancy. It detects chromosomal abnormalities.
2)TORCH test detects various infections like
HIV, Rubella, herpes simplex, etc. If mother has infection it can be passed to baby in womb.
Next Steps
For this test Sonography and blood test has to be done simultaneously.
Health Tips
You will need your gynaecologist/ doctor's prescription for the test.