Gynaecology & Obstetrics

Which of these is true of fetal circulation?

Fetal hea chambers work in series to effectively supply brain and hea with higher oxygenated blood

The ductus venosus is the main branch of umbilical aery

The oxygen content of blood delivered to hea from IVC is higher than that leaving the placenta

The more oxygenated blood in the right atrium crosses the foramen ovale to the left atrium