  We present measurements of the orbital positions and flux ratios of 17 binary
and triple systems in the Ophiuchus star forming region and the Upper
Centaurus-Lupus cluster based on adaptive optics imaging at the Keck
Observatory. We report the detection of visual companions in MML 50 and MML 53
for the first time, as well as the possible detection of a third component in
WSB 21. For six systems in our sample, our measurements provide a second
orbital position following their initial discoveries over a decade ago. For
eight systems with sufficient orbital coverage, we analyze the range of orbital
solutions that fit the data. Ultimately, these observations will help provide
the groundwork toward measuring precise masses for these pre-main sequence
stars and understanding the distribution of orbital parameters in young
multiple systems.
