### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
I am 35 year old female trying to conceive since past7 years without any success. Recently I and my husband had met fertility expert who has advised me to undergo ICSI since my husband has some problem with his sperm quality. What is the procedure about?

### output:

CSI is intracytoplasmic sperm injection, the newest fertility technique. CSI method is used as in your case when infertility is mostly due to male sperm issues.CSI is a very effective method to get fertilization of eggs in the Invited fertilization lab after they have been retrieved from the female partner. CSI involves the use of specialized micromanipulation tools and equipment and inverted microscopes that enable embryologists to select and then pick up individual sperms in a tiny specially designed hollow CSI needle. Then the needle is carefully advanced through the outer shell of the egg and egg membrane and the sperm is then injected into the inner part (cytoplasm) of the egg.  This will usually result in normal fertilization in approximately 70-85% of eggs injected with viable sperm. First, the woman must be stimulated with medications and have an egg retrieval procedure so that we can obtain several eggs in order to attempt in vitro fertilization and CSI.CSI differs from Invited fertilization, wherein one egg is mixed with 1 lakh sperms, with fertilization taking place on its own, CSI is a technique where each egg is held and injected with a single live sperm. This micro-fertilization is done with the help of a machine called the Micromanipulator. Pregnancy success rates for in vitro fertilization procedures with CSI have been shown in some studies to be higher than for Invited Fertilization without CSI.