The Reproductive System

The question asks about the technique called Test tube baby. Let's evaluate the options to determine which one is correct.

1. In-vitro fertilization (IVF): This is a process where an egg is fertilized by sperm outside the body. It involves monitoring and stimulating a woman's ovulatory process, removing an ovum or ova from the woman's ovaries and letting sperm fertilize them in a laboratory fluid. The embryo is then transferred to the uterus. This technique is often termed as the "test tube baby" technique.
2. In-vivo fertilization: This refers to the natural fertilization process occurring inside the body. It is not associated with the concept of a "test tube baby".
3. Artificial insemination: This procedure involves directly inserting sperm into a woman's reproductive system. It is a treatment for infertility and does not involve fertilization outside the body.

Based on the explanations above, Option 1: In-vitro fertilization (IVF) is the correct answer for the test tube baby technique. This technique involves creating an embryo outside the human body and is commonly referred to as the test tube baby process because the initial fertilization occurs in a laboratory setting.

Therefore, the correct answer is In-vitro fertilization.