Final answer:
At 6 weeks pregnant, the developing baby is in the embryonic stage, concentrating on organ development. This period is pivotal for the growth of body structures and organ systems, leading up to the fetal stage starting at week 9.
Step-by-step explanation:
Anastasia is 6 weeks pregnant. At this time, the developing baby is in the embryonic period, which is the most important time for physical development of the organs. The embryonic stage is crucial because the embryo begins to develop body structures and organ systems. All major body organs start to form, although most of them are not yet fully functional.
The embryonic stage lasts about six weeks, after which the fetal stage commences at week 9. The fetal stage is when the body, brain, and organs continue to grow and the fetus begins to take on more human characteristics and functions necessary for life outside the womb. Anastasia's baby is currently in a phase where essential development is happening, making prenatal care extremely important.