(1) I have no idea why height should be measured at each visit for pregnant adolescents since we would not expect much linear growth in the pregnant adolescents (i.e. growth will be dominated by the pregnancy). We would also not expect height loss. Any height gain would probably indicate good nutritional status. Measuring height may be a hangover from when we thought BMI was useful in pregnancy. Are you sure you have not misread "weight"? Weight should be monitored. It is also common to measure fundal height (i.e. top of uterus to top of pubic bone) during pregnancy. (2) There is a scientific consensus that low MUAC is a strong predictor of low birth weight (and other negative outcomes). Some studies report increased incidence of negative outcomes at MUAC < 260 mm. [url=http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3682760/]A recent review[/url] of evidence recommended using MUAC < 230 mm. This issue has also been discussed in these threads on EN-NET: [url]http://www.en-net.org/question/215.aspx[/url] [url]http://www.en-net.org/question/261.aspx[/url] [url]http://www.en-net.org/question/348.aspx[/url] [url]http://www.en-net.org/question/1515.aspx[/url] I hope this of some use.