'non-ovulatory' originates from English by combining the negative prefix 'non-' (from Latin 'non', meaning 'not') with 'ovulatory', which ultimately traces to Latin 'ovum' meaning 'egg' and the adjectival element derived from Latin '-atorius'/'-atory'.

'ovulatory' developed from Latin 'ovum' ('egg') into Medieval/Modern Latin forms such as 'ovulātōrius' (or 'ovulatorius'), and then entered English as 'ovulatory'; the modern English compound 'non-ovulatory' is formed by adding the productive negative prefix 'non-' to that adjective.

Initially the root referred simply to 'egg' or 'egg-related' concepts; over time 'ovulatory' came to mean 'relating to ovulation', and the addition of 'non-' yields the current meaning 'not producing or involving ovulation'.