The Effect of Crowning Time on Levator Ani Muscle Avulsion
This study is investigating if the timing of a baby's head appearing during labour, known as 'crowning', can impact tears in a key pelvic floor muscle called the levator ani. This muscle is vital for bladder control and supporting pelvic organs. Damage to it during vaginal birth can lead to problems like urinary incontinence (leaking pee) and pelvic organ prolapse (when organs drop). While some risk factors for tears are known, this study is the first to specifically look at the crowning time. Researchers will use ultrasound scans on new mothers and ask them about symptoms to understand the link between crowning time, muscle tears, and any related health issues. The aim is to find ways to prevent these common complications.
At a glance
What is this study about?
When a woman gives birth naturally, a muscle in her pelvic floor called the levator ani plays a very important role. Think of your pelvic floor as a strong hammock of muscles that supports your bladder, womb, and bowels. The levator ani muscle is a key part of this hammock, helping you to control your bladder and keep your organs in place.
Sometimes, during a vaginal birth, this muscle can get stretched or torn away from where it's attached. This type of tear, called an 'avulsion', can lead to problems like leaking urine (urinary incontinence) or pelvic organ prolapse, where organs might feel like they are slipping down. We already know that certain things, like the use of forceps during delivery, can increase the risk of these tears.
This study is looking into something new: whether the timing of when the baby's head first becomes visible during labour (what doctors call 'crowning') affects the chances of a levator ani muscle tear. The aim is to understand this better so that in the future, we might be able to find ways to reduce the risk of these tears and prevent the long-term health problems they can cause for new mothers.
Key takeaways
- This study investigates muscle tears from childbirth.
- It focuses on the timing of 'crowning' during delivery.
- The levator ani muscle is key for bladder control and support.
- Tears can lead to bladder weakness or organ prolapse.
- Researchers hope to find ways to prevent these injuries.
Who may be eligible?
This study is looking for women who are pregnant for the first time and are expecting one baby. Your pregnancy should be at least 37 weeks along, and you should be planning a natural vaginal delivery where the baby is head-down. You would still be able to join if you've had a very early miscarriage (before 20 weeks) or your baby weighed less than 350 grams at that time.
However, there are some reasons why you wouldn't be able to take part. For example, if you have a medical reason that prevents you from having a vaginal delivery, or if you need help with your delivery (like forceps or a ventouse). You also can't join if you are under 18, if your baby's shoulder gets stuck during birth, or if you've had major surgery on your pelvic area before. Carrying twins or more, or if your baby sadly passed away in the womb also means you couldn't participate.
Could this study suit you?
Answer these quick questions to see if you may be eligible. This is a guide only — the research team makes the final call.
- Are you pregnant for the first time?
- Is your baby head-down and due naturally?
- Will you be at least 37 weeks pregnant at delivery?
- Are you over 18 years old?
- Have you *not* had any major pelvic surgery?
- Are you expecting only one baby?
What does participation involve?
If you decide to take part in this study, here's what would happen: After your baby is born, and after you've given consent, you would have a special type of ultrasound scan. This is called a 4D transperineal ultrasound, which is a detailed scan of your pelvic muscles. It's similar to other ultrasound scans, but it gives a very clear picture of the area. You would also be asked to fill out some questionnaires. These questionnaires would ask about any bladder or pelvic symptoms you might be experiencing after childbirth. The researchers will also look at your hospital delivery notes to gather some information about your labour. All of this helps them understand if there's a link between how your baby was born and the health of your pelvic floor muscles. The total duration of your active involvement would be relatively short, taking place after you've given birth.
Potential risks and benefits
Locations (1)
- CHUS FleurimontVerified postcodeSherbrooke, Canada· Recruiting
Common questions
What is the 'levator ani muscle'?
It's a key muscle in your pelvic floor, helping to support your bladder and other organs, and controlling when you pee.
What does 'crowning' mean?
Crowning is when the baby's head becomes visible in the birth canal during labour.
What is 'pelvic organ prolapse'?
It's when your pelvic organs, like your bladder or womb, drop down from their normal position.
Will treatment be offered if a problem is found?
This study is for research only. Any findings would be shared with you and your doctor, who would discuss any necessary treatment.
How long will my privacy be protected?
All your personal information and study data will be kept strictly confidential according to privacy laws.
How to find out more
Megan Boutilier, resident in OBGYN, Medical Degree
Always speak to your GP or specialist before deciding to take part in a study.
Interested in taking part?
Discussion
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