Which of the following technique is used to treat male factor infertility?
Intrauterine insemination (IUI)
Gamete intrafallopian transfer (GIFT)
Zygote intrafallopian transfer (ZIFT)
Intracytoplasmic sperm injection (ICSI)
ICSI is a special form of in vitro fertilization technique that helps in the formation of an embryo by direct injection of the sperm into the egg/ovum. It is used in cases where the male partner has a low sperm count, poor sperm motility, or poor quality of sperm to penetrate the oocyte. Hence option 4 is the correct answer.