Obstetric Anal Sphincter Injury and Female Sexual Dysfunction: A Systematic Review.

Importance: This is the first systematic review on female sexual dysfunction (FSD) in patients who sustained obstetric anal sphincter injury (OASI).

Objective: The aim of the study was to characterize FSD following OASI.

Study design: Between January and April 2024, we conducted a literature search of studies that explored outcomes of FSD following OASI, reporting on rates of dyspareunia and/or using questionnaires that measured female sexual function.

Results: Fourteen studies with 1,907 OASI patients met inclusion criteria. Rates of dyspareunia in the first year after OASI ranged from 27% to 35% with only 40%-57% of women having resumed sexual activity at 3 months postpartum. The Female Sexual Function Index (FSFI) and Pelvic Organ Prolapse/Urinary Incontinence Sexual Questionnaire (PISQ-12) were the most utilized questionnaires. Using the FSFI, the range of FSD was 47%-81% among patients with OASI. The FSFI subdomain scores (maximum 6) for desire and arousal had the least improvement with time, ranging from 1.3-2.1 at 2 months to 3-3.1 at 4 months. Pain, lubrication, and orgasm domains showed greater improvement with time, ranging from 1.4-1.6 at 2 months and up to 3.5-3.8 at 4 months. Five studies used the PISQ-12 with mean scores of 34.1-39 (range 0-48), 3 of which included a non-OASI control group and found similar PISQ-12 scores between groups. Physical therapy did not significantly impact FSD.

Conclusions: One-third of patients with OASI experience dyspareunia in the first year postpartum, 1in 2 patients do not resume intercourse at 3 months postpartum, and FSD, measured by the FSFI, may be present in 80% of women with OASI at 3 months postpartum.