A month after announcing on Instagram that she was pregnant, the pop star Britney Spears has posted an update saying that she suffered a miscarriage, writing: “We have lost our miracle baby.”

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When Ms. Spears, 40, let it be known that she was pregnant, her announcement was seen by many not only as glad tidings,

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but also as a declaration of agency after being freed from a conservatorship that had governed her life since she was in her 20s.

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She described having experienced depression during a previous pregnancy, and said that this time she would be staying in more and doing yoga each day.

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She ended her message by writing: “Spreading lots of joy and love,” followed by heart emojis and exclamation points.

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[{"selector":"#anim-9879d2a3-1cf6-4118-88b4-117aa2794442 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate(0%, 0%) scale(1.5)","translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] [{"selector":"#anim-0f3ae126-7270-43a0-a562-82f187cb39f9","keyframes":{"opacity":[0,1]},"delay":0,"duration":4000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-5ed4876c-b402-47b4-b794-39f7b6172d7c","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":4000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] “Our love for each other is our strength,” it added. “We will continue trying to expand our beautiful family.”