Actively Recruiting
The Effect of Crowning Time on Levator Ani Muscle Avulsion
Led by Université de Sherbrooke · Updated on 2025-10-07
92
Participants Needed
1
Research Sites
144 weeks
Total Duration
On this page
Sponsors
U
Université de Sherbrooke
Lead Sponsor
C
Centre de recherche du Centre hospitalier universitaire de Sherbrooke
Collaborating Sponsor
AI-Summary
What this Trial Is About
Levator ani muscle is one of the main components of perineal muscles and plays a crucial role in urinary continence and pelvic organ support. An avulsion, detachment from its insertion, of this muscle can occur during vaginal birth. It is well known that this major injury can cause many symptoms such as urinary incontinence and pelvic organ prolapses. Some risk factors of this important injury have been identified in the literature, such as the use of forceps. However, to date, no study has evaluated the impact of the crowning of the fetal head during labor on perineal muscles, specifically the levator ani muscle avulsion. Hence, the objectives of this study are to evaluate the association i) the time of the crowning of the fetal head during labor and levator ani muscle avulsion, ii) the time of the crowning of the fetal head and urogynecological symptoms, and iii) use of episiotomy and levator ani muscle avulsion. Postpartum primiparous women will undergo a 4D transperineal ultrasound to evaluate their pelvic muscles and complete questionnaires assessing urogynecological symptoms.
CONDITIONS
Official Title
The Effect of Crowning Time on Levator Ani Muscle Avulsion
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Primiparous women (first pregnancy) at term (37 weeks or more)
- Spontaneous vaginal delivery planned
- Cephalic (head-down) presentation of the baby
- History may include miscarriage before 20 weeks or fetal weight under 350g
You will not qualify if you...
- Contraindications to vaginal delivery
- Assisted vaginal delivery (forceps or vacuum)
- Age under 18 years
- Shoulder dystocia during delivery
- Extensive pelvic reconstructive surgery (e.g., bladder exstrophy repair)
- Fetal death at term
- Twin or multiple pregnancies
AI-Screening
AI-Powered Screening
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Trial Site Locations
Total: 1 location
1
CHUS Fleurimont
Sherbrooke, Quebec, Canada, J1H 5H3
Actively Recruiting
Research Team
M
Megan Boutilier, resident in OBGYN, Medical Degree
CONTACT
M
Marie-Élisabeth Bouchard, MD, Urogynecologist
CONTACT
How is the study designed?
Study Type
OBSERVATIONAL
Masking
N/A
Allocation
N/A
Model
N/A
Primary Purpose
N/A
Number of Arms
1
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