Delayed delivery of second twin, triplet, etc.多胎妊娠中的第二个及以上胎儿的延迟分娩
（） etc. is used at the end of a list to indicate that you have mentioned only some of the items involved and have not given a full list. etc. is a written abbreviation for "etcetera." 等等
She knew all about my schoolwork, my hospital work, etc.
她知道所有有关我的学业、医院工作等情况。