Not my field, but I am guessing that this is a reference to a pregnant woman and whether the baby has engaged or not. In this case it has. ----- see "engage into the pelvic brim", "descend into pelvic area" etc.

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Note added at 58 mins (2010-09-25 18:12:51 GMT)
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OK. I should tell you how I arrived at my suggestion. I Googled "likestand" and the hits I found referred to "high" likestand, which refers to the position of the baby before it engages or descends into the pelvis.

Bekkenlikestand. Ingen scoliose. = Pelvic obliquity. No scoliosis


"Pelvic obliquity can be caused by leg length inequality, contractures about the hips, as part of a structural scoliosis, or as a combination of two or more of these causes. Careful physical and radiologic evaluations are necessary to establish the correct diagnosis. "
http://www.ncbi.nlm.nih.gov/pubmed/3715623

For pictures of pelvic obliquity, see
http://www.google.dk/images?hl=da&biw=1252&bih=611&q=pelvic ...

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Note added at 10 hrs (2010-09-26 03:39:40 GMT)
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I would have agreed with Jutts Barth, if she had simply said 'pelvic obliquity'. Pelvic obliquity is caused by scoliosis. And, since there was no scoliosis, the conclusion that there was 'no pelvic obliquity' is correct. But, source text is differently worded.