AP PSYCHOLOGY

Detailed explanation-1: -Once it reaches the uterus, the morula becomes a blastocyst. The blastocyst then burrows into the uterine lining-a process called implantation.

Detailed explanation-2: -Near the end of this week, the blastocyst will attach itself to the endometrium, the lining of the uterus. This is called implantation. The implantation in the uterus creates an essential connection-the endometrium provides the developing embryo with nutrients and removes wastes.

Detailed explanation-3: -Implantation (nidation) is the stage in the embryonic development of mammals in which the blastocyst hatches as the embryo, adheres, and invades into the wall of the female’s uterus.

Detailed explanation-4: -About 10 to 12 days after fertilization, the blastocyst develops into an embryo. It remains an embryo until about nine weeks after implantation, when it then becomes a fetus.

Detailed explanation-5: -Implantation. Once the embryo reaches the blastocyst stage, approximately five to six days after fertilization, it hatches out of its zona pellucida and begins the process of implantation in the uterus. In nature, 50 percent of all fertilized eggs are lost before a woman’s missed menses.