Delayed Rupture Syndrome (DRS)

By RRM Academy Reviewed by Dr. Naomi Whittaker, MD, Board-Certified OBGYN, MIGS, NFPMC, FCI Updated May 7, 2026

Delayed Rupture Syndrome (DRS) is an ovulation disorder in which the dominant follicle ruptures gradually across approximately 48 hours rather than completing collapse within 24 hours.⁷⁸

On serial follicle maturation study ultrasound, DRS presents as partial collapse on the first observation day, followed by completion of follicular collapse on the second. That two-day rupture pattern distinguishes it from normal ovulation and from Partial Rupture Syndrome, which stalls within 24 hours and does not complete. It is also distinct from Luteinized Unruptured Follicle Syndrome, in which no rupture occurs.⁷⁸

DRS sits within Hilgers' sonographic classification of ovulation disorders as a named entity associated with periovulatory endocrine abnormalities. Protracted rupture reflects dysregulation of the LH surge and follicular response. Corpus luteum quality and post-Peak progesterone are affected in proportion to the timing disruption.

Fecundity is reduced in DRS cycles. Restorative interventions targeting follicular maturation and ovulation support can normalize rupture timing when the underlying endocrine defect is identified and treated.

This content is for educational purposes only and does not constitute medical advice. Consult an RRM clinician or healthcare provider for guidance specific to your situation.