Physiology of cervical ripening and dilatation

Ernst Lengyel, S Pildner von Steinburg
In: Der Gynäkologe · 2001 · vol. 34(8) , pp. 708–714 · doi:10.1007/s001290170003 · W2021050645
article OA: closed CC0
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⚙ AI-generated summary by claude@2026-06+body, 2026-06-08 ⓘ

Cervical ripening is an independent biochemical process involving water retention, collagen reorganization, and protease activation, later aided by inflammation and finally resulting in dilatation by uterine contractions.

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⚙ AI-generated deep summary by claude@2026-06, 2026-06-10 ⓘ

This paper reviews the physiology of cervical ripening as a coordinated, strictly regulated biochemical cascade that begins relatively independently of uterine contractions, involving humoral mediators including prostaglandins, estrogen, and nitric oxide. It describes how these signals activate proteases that digest cervical collagen and promote water retention with collagen fibril reorganization, and it further notes that an abacterial or, when infection is present, bacterial inflammatory response can accelerate the process via infiltrating immune cells releasing cytokines, NO, and proteases. Contraction-driven mechanical forces are then said to mediate cervical dilatation, while premature cervical maturation is described as initiating this cascade too early and irreversibly, leading to loss of the cervix’s closure and support function. This paper does not explicitly discuss endometriosis or adenomyosis; it was included in the corpus via a keyword match in the upstream search index.

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last seen: 2026-06-10T17:14:06.276822+00:00
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