You'll need to include this. 1  address. 2  credit. 3  mailing. Mailling.  payment.
You're both right. Genetics play a mild role in major depression (a bigger role in bipolar disorder). Genetics may serve as a predisposing factor to depression, but the evidence is growing that depression has a great deal to do with the ongoing and repetitive interactions within the family.
Researchers continue to study serotonin as the key to the genetic link. Problems with the serotonin transporter gene have also been considered as a source for depression. Research has traced the presence of long and short transporter genes to a possible genetic connection.