Psychological, behavioural and physiological effects of three long-acting reversible contraception (LARC) methods: protocol for an ancillary study of the ECHO randomised trial.

BMJ Open · 2017 · PMC5695523 · PMID 29133336

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did not reach statistical significanceno p-value reported

3 Dysmenorrhea and heavy periods were reported more frequently among women in the IUD arm of the latter study; however, this effect did not reach statistical significance.

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