Need an overview of the following topics:
- Extraembryonic membranes and placentation
- Digestive system
- Development of nervous system
Here's a great picture of the extraembryonic tissues http://188.8.131.52/faculty/webpages/stodd/oceanweb/bio2/bio2lectures/Lecture9/sld031.htm and http://ulisse.cas.psu.edu/4hembryo/physiology.html
These tissues form from the dividing blastoderm but do not contribute to the embryo proper. Instead they provide vital support and protection to the embryo. The extraembryonic tissues consist of the yolk (provides lipid rich nutrients ie food), allantois (collects waste products, allows for gas exchange and digestion), chorion (protects the embryo by emclosing it and the other etra-embryonic tissues) and amnion (protective cushion that allows for embryonic movement).
The placenta is a specialized structure found in mammals. It is the primary connection between teh embryo and its mother. Unlike in egg laying animals, mammalian embryos receive their oxygen and nutrients through the placenta. The flow of blood returning to the mother provides filtration of waste by the mother's kidneys. For more detail see ...
Embryology terms such as extraembryonic membranes and placentation, digestive system, and Development of Nervous system are reviewed.
Embryo Donation Couples' Counseling
Transitioning to Parenthood Scenario
Using articles from library searches, analyze the social, psychological, work, and financial adjustments that the couple in the scenario below might experience as they move into parenthood. Discuss any cultural issues that might impact the transition.
Joe and Cathy Ramirez, a young Mexican American couple, have been married for three years. Joe, 26, is a computer analyst for a growing company, and Cathy, 24, is a marketing assistant. They were childhood sweethearts and married right after college. They are expecting their first child through an embryo donation. They feel fortunate that both sets of parents live 15 to 20 miles from them.
Ethics and Practice Scenario
Recall the couple from this unit's first discussion, the Ramirez couple. Imagine you are a practitioner who is leading parenting and counseling courses for expecting parents in the Ramirez's community. As a practitioner, you have ambivalent feelings about embryo donations. What ethical issues emerge for you as a practitioner?