What causes developmental dysplasia of the hip (DDH)?
Hip dysplasia is considered a "multifactorial trait." Multifactorial inheritance means that many factors are involved in causing a birth defect. The factors are usually both genetic and environmental. Often, one gender (either male or female) is affected more frequently than the other in multifactorial traits. There appears to be a different "threshold of expression," which means that one gender is more likely to show the problem than the other gender. For example, hip dysplasia is more common in females than males. One of the environmental influences thought to contribute to hip dysplasia is the baby's response to the mother's hormones during pregnancy. A tight uterus that prevents fetal movement or a breech delivery may also cause hip dysplasia. The left hip is involved more frequently than the right due to intrauterine positioning.
What are the risk factors for developmental dysplasia of the hip (DDH)?
First-born babies are at higher risk since the uterus is small and there is limited room for the baby to move; therefore affecting the development of the hip.
Other risk factors may include the following:
- family history of developmental dysplasia of the hip, or very flexible ligaments
- position of the baby in the uterus, especially with breech presentations
- oligohydraminos (low amniotic fluid level)-we had this at he end of the pregnancy
- frank breech position
- c-section birth
Prognosis:
In 90% of cases, developmental dysplasia of the hip (DDH) resolves without consequence.
In 10% of cases, there may be long term problems, including pain, stiffness and arthritis.
Congrats on reading all of that-you are now a pro!
In other news-I started a photography class last night, which is the best thing that I have ever done for myself (aside from marrying kevin, having jake, and getting the pugs!). So be on the look out for lots of baby and pug pictures (and maybe some of Kev) as I try to perfect my skills behind the camera!
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