Assisted reproductive technology, IVF involves transfer of:
ovum into the Fallopian tube
embryo upto 8-celled stage into the Fallopian tube
embryo upto 8-celled stage into the uterus
embryo with 16 blastomeres into the Fallopian tube
In IVF (In Vitro Fertilisation), the zygote or early embryos (with up to 8 blastomeres) are transferred into the fallopian tube (ZIFT - Zygote Intra Fallopian Transfer). Embryos with more than 8 blastomeres are transferred into the uterus (IUT - Intra Uterine Transfer) . Transfer of an ovum into the fallopian tube is known as GIFT (Gamete Intra Fallopian Transfer) .
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