Where does the fertilized egg implant for development?

The fertilized egg implants in the uterus for development because this organ provides the appropriate environment for a developing embryo. The uterus is specially designed to accommodate the growth of the embryo, offering a rich supply of blood and nutrients necessary for its development. The uterine lining, or endometrium, undergoes changes in preparation for implantation, thickening to create an ideal site for the fertilized egg to attach and grow.

In contrast, the ovary is where eggs are produced and released but does not provide a suitable environment for implantation. The oviduct, or fallopian tube, is where fertilization typically occurs as sperm meets the egg, but it is not designed for the long-term development of an embryo. The bladder is part of the urinary system and has no role in reproduction or supporting embryonic development. Thus, the uterus stands out as the only correct location among the options given for the implantation of a fertilized egg.