Final answer:
During the first trimester of pregnancy, the main developmental task for expectant mothers is to facilitate placental formation and function, ensuring proper nutrition and waste management for the embryo and fetus, while avoiding harmful substances and focusing on proper nutrient intake.
Step-by-step explanation:
Developmental Task for Expectant Mothers During the First Trimester
The developmental task for expectant mothers during the first trimester of pregnancy primarily involves ensuring the proper formation and function of the placenta. Nutrition and waste exchange between the mother and embryo is initially handled by the endometrial lining through diffusion, but as the trimester progresses, the placenta starts to form. This critical organ eventually takes over the role of supplying nutrients and disposing of waste. Mothers should maintain optimal health by avoiding toxic substances, consuming essential nutrients like folic acid, calcium, iron, and omega-3 fatty acids, and receiving regular prenatal care to reduce the risk of complications. Increased nutritional intake is vital, as these nutrients are important for the development of the embryo and fetus, and also aid in the prevention of certain birth defects.