Ultrasound , to follow the follicles so stimulated during ovulation induction. Egg retrieval , via ultrasound-guided needles to suction the eggs out of the follicles. Insemination in a dish, with resulting conception of one or more embryos. GIFT-Gamete Intrafallopian Transfer. ZIFT-Zygote Intrafallopian Transfer.
Conception takes place in the lab.
The fertilized egg, called a zygote , rolls down toward the intrauterine cavity, like in normal fertilization. ICSI-Intracytoplasmic Sperm Injection. This process, wherein a single sperm is injected into the egg, is used when there is a low sperm count or only a small percentage of sperm is healthy. The Catholic position on ART is mostly negative, except for AI and GIFT, where fertilization takes place in the tube, as is the norm. In all of the other techniques, fertilization outside the human body is seen as unnatural and is viewed as not acceptable.