Question

artificial cloning of animals (artificial twinning)

Accepted Answer

after egg fertilises, it divides to form ball of cells (totipotent), cells continue to divide until embryo is hollow ball of cells (embryo cant divide anymore)

In natural twinning, early embryo splits and 2 foetuses develop from the 2 halves of the divided embryo. Same thing with artificial twinning but manual split in early embryo (may split into >2 pieces to form more identical offspring in farming etc..)

Artificial twinning process in cattle

cow with desirable traits treated with hormones so she super-ovulates (release more mature ova)
ova fertilised naturally/artificial insemination by bull with desirable trait
early embryos flushed out uterus or mature eggs removed and fertilised with artificial insemination
around day 6, cells of early embryo split to form more smaller embryos
each split embryo grown in lab before implantation into separate surrogates
embryos develop into foetuses and born naturally

some embryos may be frozen to see whether it was successful before implanting further embryo

Embryo Artificial Cells Early Split Form Ball Divide