Frequent Use of Premenopausal Progestin in Prior Pre-Eclamptic Women.

Women with a history of pre-eclamptic pregnancy are predisposed to later occlusive vascular diseases. We compared the use of cyclic progestins or levonorgestrel-releasing intrauterine device (LNG-IUD) for treatment of menstrual cycle abnormalities between premenopausal women with and without a prior pre-eclamptic pregnancy. Register-based cohort study during 1994-2019 of oral progestin or levonorgestrel-releasing intrauterine device (LNG-IUD) in Finnish women with (n=31 688) and without (n=91 726) prior pre-eclampsia in 1969-1993. Cyclic progestin or LNG-IUD use and its association with future use of menopausal hormone therapy (MHT). Prior pre-eclamptic women had used cyclic progestins more often (23.5% vs. 9.1%; p<0.001) and initiated the use at younger ages (41.8 years [SD=6.3] vs. 45.9 years [3.1]; p<0.001) than control women. Also, LNG-IUD was inserted more frequently (p<0.001) in prior pre-eclamptic women (9.3%) than in controls (4.7%). Cyclic progestin or LNG-IUD use was accompanied by significant 37-90% elevations in future MHT use. Increased use of cyclic progestins and LNG-IUD in premenopausal women with a history of pre-eclamptic pregnancy can be seen as indirect evidence of earlier onset of ovulatory dysfunction. This may contribute to the elevated risk of endometrial cancer in these women. Our findings may indicate one additional late sequela of pre-eclamptic pregnancy.

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