Doesnt Vitro create many embryos which later are destroyed/die because of bad womb environment? Wouldn't that be like an abortion at an early stage?
In vitro fertilization (IVF) merely means that fertilization takes place outside the body.
The zygotes (the organism that results from the union of sperm and egg) are allowed to develop to a certain stage prior to being implanted in the mother's uterus. Some of these do not develop and are therefore not viable for pregnancy.
It is uncommon nowadays for so many embryos to be implanted, due to the risks involved with multiple gestation pregnancies. There are risks with twin pregnancies, and those risks are multiplied even more with each embryo that is implanted. There are risks to both the mother and the fetuses - these infants are predicted to have serious sequelae due to their prematurity, possibly including blindness, deafness, cerebral palsy, etc. That being the case, it is now considered prudent to transfer two embryos, possibly three, with IVF procedures. Of course, there are possibilities that single embryos can become twinned themselves after implantation.
If your question is whether a non-viable IVF pregnancies are like a deliberate therapeutic abortion, I would have to say no. These IVF babies are very much wanted, and the parents have often been trying to get pregnant for many years. If you want something of a closer comparison, it is more like a miscarriage when an embryo is not viable.