Cycle and ovulation
Oligo-ovulation means ovulation happens, but rarely or at unpredictable intervals — often with cycles longer than 35 days. Fewer ovulations means fewer chances to conceive each year. It is investigated in the same way as anovulation and often responds to the same treatments.
Also known as: infrequent ovulation, oligo ovulation
Sources
- Royal Australian and New Zealand College of Obstetricians and Gynaecologists (ranzcog.edu.au)
Last reviewed: 10 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.