in the test tube baby programme, the zygote or early embryos (with up to 8 blastomeres) are transferred into the fallopian tube (ZIFT). Embryos with more than 8 blastomeres are transferred into the uterus (IUT – Intra Uterine Transfer) to complete their further development . Since the question specifies an embryo with more than 16 blastomeres, it falls into the category requiring transfer to the uterus.