Rihanna is worried about what childbirth will do to her private parts.

The 'FourFiveSeconds' singer has confessed she's terrified of ever having a child and regularly researches the impact of delivering a baby which has only worsened her fear.

Asked what she searches for online, she admitted: ''Oh, random things. Like I will be sitting around Googling childbirth.''

Confessing it's not just the birthing process she is afraid of, the 27-year-old star continued to say she would be concerned about how her vagina would recover after pushing a baby out.

She explained: ''Childbirth is putting it the not-gross way. I was searching the size of certain things, and how much they expand, and then what happens after...''

The R&B superstar - who is currently working on her eighth studio album 'Anti' - went on to go into detail about what exactly she's afraid of, even though she has no plans to get pregnant any time soon.

Speaking out loud as she searched the web to find out what the name of her phobia is, she told T Magazine: '''Phobia of a big vagina' ... 'Deep' ... This is awful. I can't believe I'm typing this in!''