Question

This is a form of prenatal testing that is most commonly performed between the 10th and 12th week of pregnancy and involves the insertion of a soft plastic tube into the vag ina to obtain cells.

Heterozygote screening

Presymptomatic screening

Amniocentesis

Preimplantation genetic analysis

Chorionic villus sampling

Answer 1

Answer: Chorionic villus sampling

Explaination: This sampling techinque is done between the 10-12th week of the pregnency. In this screening test the small pieces of placental tissue is obtained for the determination of any chromosomal abnormalities in developing fetus like down syndrome, and genetic condition such as cystic fibrocis. Chorionic villus sampling are two types:

1) trans abdominal test: This type of test is done through the belly

2) trans cervical test: This type is done through cervix in which soft plastic tube is inserted in vag ina to obtain placental cells.

There are some side effects of chorionic villus sampling like cramps,  spotting and very small chance of mis carriage or abortion.