During which gestational week does the fetal heart typically start beating?

• A. Week 4
• B. Week 5
• C. Week 6
• D. Week 7

Answer: (B)

The fetal heart typically begins to beat around the fifth week of gestation. At this point, the heart has developed enough to pump blood and can be detected via ultrasound. This is an important milestone in fetal development, as the heart is crucial for supplying oxygen and nutrients to the growing embryo.

In the weeks leading up to this, specific heart structures are formed, and while there may be electrical activity prior to the fifth week, it is usually around this time that a coordinated heartbeat is established and can be observed. This timing correlates with the overall development of other organ systems, beginning to create a more complex structure and functioning of the embryo.

The timeline of fetal development is crucial for understanding prenatal health and monitoring during pregnancy, as the presence of a heartbeat is an important indicator of viability.