Spears announced the loss on Instagram Saturday in a joint post with her partner, Sam Asghari.
Britney Spears says she's lost baby due to miscarriage
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The 40-year-old Spears has said she longed for a baby with the 28-year-old Asghari, a personal trainer, but she has said the nearly 14-year-long conservatorship forced her to remain on birth control.
Britney Spears confuses some with Instagram pregnancy news
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