Perinatal depression: What is the condition Britney Spears suffered from during her previous pregnancy?

has announced she is pregnant with her third child, six months after her 13-year conservatorship was ended.

The 40-year-old pop star revealed that she suffered from perinatal during her previous , adding: “I have to say it is absolutely horrible.”

Spears has two , Sean Preston Federline, 15, and Jayden James Federline, 15, from her previous marriage to Kevin Federline. Her third pregnancy is shared with her 28-year-old fiancee, .

In an Instagram post , the Toxic singer wrote: “Women didn’t talk about [perinatal depression] back then… Some people considered it dangerous if a woman complained like that with a baby inside her.

“But now women talk about it every day Thank Jesus we don’t have to keep that pain a reserved proper secret.”

But what is perinatal depression and what are the symptoms?

What is perinatal depression?

Perinatal depression is a mood disorder that occurs during or after pregnancy and can range from being mild to severe.