Sentence:  One <WSD>female</WSD> , collected on an island off the coast of Nicaragua , was gravid and measured 4 feet 8 inches from snout to vent ( her tail should be between 6 and 7 inches long ) . 
Meaning of the word marked with <WSD> tags:  an animal that produces gametes (ova) that can be fertilized by male gametes (spermatozoa)