In countries across the world women are deciding to delay motherhood. Increased access to education, more career opportunities and less financial stability means that more and more women are having children later in life. But fewer babies now, could mean more economic pressures on the rest of us in the future.

Katya Adler explores this complex topic with the BBC's population correspondent Stephanie Hegarty and Joyce Harper, professor of reproductive science at University College London.

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Producers: Alice Aylett Roberts, Beth Timmins and Miriam Quayyum

Sound engineers: Mike Regaard and Hannah Montgomery

Assistant editor: Sergi Forcada Freixas

Senior news editor: Jonathan Aspinwall