The placenta has long been thought to produce serotonin during pregnancy. But in a new study, Yale researchers shatter the deep-rooted hypothesis — and show that the placenta doesn’t produce serotonin ...

During the first weeks of pregnancy, the developing placenta in a mother's womb undergoes a dramatic change. Individual cells merge, forming a continuous barrier that will spend the next nine months ...

The placenta has long been thought to produce serotonin during pregnancy. But in a new study, Yale researchers shatter the deep-rooted hypothesis—and show that the placenta doesn't produce serotonin ...