Question

In vitro fertilization is a technique that involves the transfer of which one of the following into the fallopian tube?

• A. Embryo only, upto 8 cell stage
• B. Embryo of 32 cell stage
• C. Either zygote or early embryo upto 8 cell stage
• D. Zygote only

Answer 1

The correct option is C

Either zygote or early embryo upto 8 cell stage

The correct option is C.

Explanation of the correct option:

1. In the in vitro fertilization the zygote or the early embryo is transferred.
2. The transfer is done to the fallopian tube.
3. The baby is produced by conceiving in a type of culture dish and nourished inside the uterus.

Explanation of the incorrect options:

Option A:

1. In vitro fertilization (IVF) fertilizes one or more eggs but outside the body.
2. This IVF is an example of the ZIFT and it only forms up to 8 stages.

Option B:

1. In the stage of the embryo many steps are included.
2. The stage after the embryo is known as the blastula.
3. The stage in which 32 cells are formed contains inner cell mass or outer cell mass.

Option D:

1. Zygote is called a eukaryotic cell which is formed by the fertilization between two gametes.
2. Combination of DNA from each gamete forms a zygote.
3. IVF does not involve only the zygote formation.

Final answer: Transfer of either zygote or early embryo up to 8 cell stage is done into the fallopian tube.