Embryo transfer is the step in the process whereby one or several embryos are placed into the uterus of the female with the intent to establish a pregnancy.Less commonly used techniques in in vitro fertilization are:

Assisted zona hatching (AZH) is performed shortly before the embryo is transferred to the uterus. A small opening is made in the outer layer surrounding the egg in order to help the embryo hatch out and aid in the implantation process of the growing embryo. Intracytoplasmic sperm injection (ICSI) is beneficial in the case of male factor infertility where sperm counts are very low or failed fertilization occurred with previous IVF attempt(s). The ICSI procedure involves a single sperm carefully injected into the center of an egg using a microneedle. With ICSI, only one sperm per egg is needed. Without ICSI, you need between 50,000 and 100,000. This method is also sometimes employed when donor sperm is used. Autologous endometrial coculture is a possible treatment for patients who have failed previous IVF attempts or who have poor embryo quality. The patients fertilized eggs are placed on top of a layer of cells from the patients own uterine lining, creating a more natural environment for embryo development. In zygote intrafallopian transfer (ZIFT), egg cells are removed from the womans ovaries and fertilized in the laboratory; the resulting zygote is then placed into the fallopian tube.
Morrow L. Critical Decisions for the Treatment of Health-care-Associated Pneumonia in the ICU. External links
Hospital-Acquired, Health Care Associated, and Ventilator-Associated Pneumonia from the Cleveland Clinic
Cecil Textbook of Medicine