Johnson & Johnson (J&J) has been ordered by a US court to pay more than $110 million to a woman who says she developed ovarian cancer after using its talcum powder.

Lois Slemp, 62, from Virginia, Missouri said she developed the cancer after four decades of using talc products.

Prosecutors argued J&J did not adequately warn about the cancer risks associated with the items.

Experts say links with ovarian cancer are unproven. The pharmaceutical company says it will appeal.

The verdict in a St Louis state court is the largest so far to arise out of about 2,400 lawsuits against J&J over its talc-based products, Reuters reports.

Lois Slemp is currently undergoing chemotherapy after her ovarian cancer initially diagnosed in 2012 returned and spread to her liver.

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She said the products she used included J&J’s Baby Powder and Shower to Shower Powder.

“Once again we’ve shown that these companies ignored the scientific evidence and continue to deny their responsibilities to the women of America,” said Ted Meadows, a lawyer for Lois Slemp.

The verdict included $5.4 million in compensatory damages and $105 million in punitive damages against J&J.

J&J said it planned to appeal and said in a statement: “We are preparing for additional trials this year and we continue to defend the safety of Johnson’s Baby Powder.

“We deeply sympathize with the women and families impacted by ovarian cancer.”

J&J lost three jury verdicts in 2016 in cases related to its talc-based products, but won its first trial in March, when a jury in Missouri sided with the company.