Complex sentence: The ovum now no longer needs to be fertilized as it contains the correct amount of genetic material (a diploid number of chromosomes) and, in theory, it can be implanted into the uterus of a same-species animal and allowed to develop.
Split into simpler sentences: The ovum now no longer needs to be fertilized, because it contains the correct amount of genetic material (a diploid number of chromosomes). In theory, the ovum can be implanted into the uterus of a same-species animal and allowed to develop.