Is it possible to clone humans with the technology available today ?
If yes, then why have we not done it atleast once ?

Possibly.

A big reason:
What if it goes wrong? Deformed frogs, sheep, cats, and dogs are certainly not good, but many would accept them. People would not accept mistakes in the cloning of humans. There's no guarrantee that we'd be able to clone a human successfully so the risks are not worth it.

Other moral questions/objections exist.

We are satisfied with the existing method?

Cloning of rhesus monkeys has been attempted hundreds of times, unsuccessfully. After nuclear transfer (removing the nucleus from a somatic cell and substituting it for the nucleus of an egg cell), mitotic spindles do not properly form. In subsequent cell divisions the chromosomes are not equally partitioned into the daughter cells, making a hopeless mess right from the start. See reports from 2003 here and here.

Thus, unlike sheep, mice, dogs, and other mammalian species, it seems that cloning of primates -- including humans -- faces additional technical hurdles, ethical issues aside.

quote:

Originally posted by frankvan:
We are satisfied with the existing method?

we need a confirmation from a women on that....