Student nurses in their obstetrical rotation are learning about fertilization and implantation

The process of implantation is characterized by which statements? Note: Credit will be given only if all correct choices and no incorrect choices are selected. Select all that apply. 1. The trophoblast attaches itself to the surface of the endometrium.
2. The most frequent site of attachment is the lower part of the anterior uterine wall.
3. Between days 7 and 10 after fertilization, the zona pellucida disappears, and the blastocyst implants itself by burrowing into the uterine lining.
4. The lining of the uterus thins below the implanted blastocyst.
5. The cells of the trophoblast grow down into the uterine lining, forming the chorionic villi.


1, 3, 5
Explanation: 1. During implantation, the trophoblast attaches itself to the surface of the endometrium for further nourishment.
3. Between days 7 and 10 after fertilization, the zona pellucida disappears, and the blastocyst implants itself by burrowing into the uterine lining and penetrating down toward the maternal capillaries until it is completely covered.
5. The cells of the trophoblast grow down into the thickened lining, forming the chorionic villi.

Nursing

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