Older women are more likely to suffer from post-natal depression.

Study lead Silje Marie Haga said, "Older, first-time mothers can be vulnerable to postpartum depression not primarily because of their physical age, but because they are often more accustomed to being in control of their lives. Having a baby requires a mother to be flexible when things do not go as planned, and this can be a distressing factor for women who have established a career before childbirth."
Source-Medindia