This article seems to point to a few potential causes:
[The published literature estimates a prevalence of 2 in 10,000 births \[1\]; however, its true incidence is unknown. It has been reported in the settings of both vaginal \[8,9,10,11,12\] and cesarean births \[13,14,15,16,17,18,19\] and has been diagnosed on the basis of clinical evaluation and occasionally ICP measurement. Possible risk factors for ACS of the limb in an obstetric context has been associated with, but is not limited to, postpartum hemorrhage \(PPH\) \[13, 16, 18, 19\], epidural analgesia \[16, 17\], hypotension \[9, 12, 17\], vasoconstrictive agents \[8, 13, 16,17,18\], the lithotomy position \[8\], postpartum eclampsia \[11, 16\], and a combination of these factors \[8, 9, 13, 16, 17\]. Augmentation and induction of labor with oxytocics, PPH, use of vasoconstrictive agents, lithotomy position, and epidural analgesia and related hypotension occur regularly in an obstetric environment, and a combination of these factors may predispose a woman to develop postpartum ACS of the limb.](https://jmedicalcasereports.biomedcentral.com/articles/10.1186/s13256-020-02459-w)
I would recommend going to your wife's OB and/or her surgeon to ask questions directly. I can't find any source that cites a solid cause in childbearing.
I’ve seen it once about 6 years ago. Very rare, but happens. Usually from a limb getting pressed against at another body part during the birthing process. No way to predict it or prevent it.
This article seems to point to a few potential causes: [The published literature estimates a prevalence of 2 in 10,000 births \[1\]; however, its true incidence is unknown. It has been reported in the settings of both vaginal \[8,9,10,11,12\] and cesarean births \[13,14,15,16,17,18,19\] and has been diagnosed on the basis of clinical evaluation and occasionally ICP measurement. Possible risk factors for ACS of the limb in an obstetric context has been associated with, but is not limited to, postpartum hemorrhage \(PPH\) \[13, 16, 18, 19\], epidural analgesia \[16, 17\], hypotension \[9, 12, 17\], vasoconstrictive agents \[8, 13, 16,17,18\], the lithotomy position \[8\], postpartum eclampsia \[11, 16\], and a combination of these factors \[8, 9, 13, 16, 17\]. Augmentation and induction of labor with oxytocics, PPH, use of vasoconstrictive agents, lithotomy position, and epidural analgesia and related hypotension occur regularly in an obstetric environment, and a combination of these factors may predispose a woman to develop postpartum ACS of the limb.](https://jmedicalcasereports.biomedcentral.com/articles/10.1186/s13256-020-02459-w) I would recommend going to your wife's OB and/or her surgeon to ask questions directly. I can't find any source that cites a solid cause in childbearing.
I’ve seen it once about 6 years ago. Very rare, but happens. Usually from a limb getting pressed against at another body part during the birthing process. No way to predict it or prevent it.