'Little Couple' star Jen Arnold undergoing chemotherapy

"Little Couple" star Jen Arnold tweeted a photo of herself Friday at the Houston hospital where she is undergoing chemotherapy for a rare form of cancer. "Day2 inpatient chemo- sleeping a lot, liking new anti nausea med this time, & looking to get home today! #GetWellJen," Arnold said in her Twitter post. People.com said Arnold's chemotherapy had been postponed for a week due to low blood counts. The reality TV personality, neo-natologist and mother of two young children said having to wait to start treatment meant she and her family had "a better Xmas."