After fertilization, where should the egg implant?

The correct response identifies the uterus as the appropriate site for implantation after fertilization. Once the sperm fertilizes the egg, the resulting zygote travels down the fallopian tube, undergoing cell division and development into a blastocyst. This blastocyst needs a suitable environment to implant and develop further.

The uterus provides the necessary conditions for implantation, including a rich blood supply and the right hormonal environment, which are critical for supporting early pregnancy. This organ has a specialized lining called the endometrium, which thickens in preparation for receiving the blastocyst and provides nutrients to the developing embryo.

The other locations mentioned are not suitable for implantation. The ovary is where eggs are produced and released, not where they implant. The fallopian tube is the pathway for the egg and sperm interaction but does not support implantation; if a blastocyst were to implant there, it would result in an ectopic pregnancy, which is dangerous. The cervix serves as the opening to the uterus and is not designed for implantation; its primary function is related to childbirth and menstrual flow.

Thus, the uterus is uniquely equipped to support the embryo early in development, making it the correct answer for the location of implantation after fertilization.