Douglas Harper's Etymology Dictionary
Wiktionary
                    nulliparous
                    
                        
                
                                                                    a. 1 (context of a woman or female animal English) That has not given birth 2 (context of a mosquito or other female insect English) That has not yet laid eggs
Wikipedia
                    Nulliparous
                    
                        
                
                                                                    - Redirect Gravidity and parity#Nulliparity
Usage examples of "nulliparous".
In the middle of my explanation she had turned away from the window and she again had her eye on the mentally nulliparous Plimpton.