Step 1: Understand the term I.V.F.
I.V.F. stands for In Vitro Fertilization, which is a medical procedure used to help individuals with fertility problems. It involves the fertilization of an egg outside the human body.
Step 2: Procedure of I.V.F.
The procedure includes stimulating the ovaries to produce multiple eggs, collecting the eggs, and then fertilizing them with sperm in a laboratory dish. The fertilized eggs (embryos) are then implanted into the uterus.
Step 3: Significance of I.V.F.
I.V.F. has helped many couples achieve pregnancy when other methods fail, such as in cases of blocked fallopian tubes, male infertility, or unexplained infertility.
Final Answer:
\[
\boxed{\text{In Vitro Fertilization}}
\]