Ovulation typically occurs in only one ovary during each menstrual cycle.
Physiologically, humans are monotocous species that typically release a single oocyte from only one ovary during each menstrual cycle.
The claim states that ovulation typically occurs in only one ovary during each menstrual cycle. Medical literature and reproductive biology establish that humans are monotocous and generally release a single egg from one ovary per cycle, though alternate or occasionally simultaneous multi-ovulation can occur. Papers 5 and 9 support aspects of normal single-ovary ovulation patterns and mechanics.
Zhen-Zhen Wang, Lianwei Xu, Li Zhao, Yi-jia Chen, Hui-cong Liu, Erkai Yu. Simultaneous bilateral fallopian tubal pregnancy of a laparoscopic definite spontaneous unilateral ovulation: a case report. 2022. https://doi.org/10.1186/s12884-022-04453-0
Paper 5 reports a case of simultaneous bilateral tubal pregnancy featuring two corpus luteums in a single ovary, confirming that unilateral ovulation can occur (where only one ovary releases an egg during the cycle).
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Sezcan Mumusoglu, Qingling Yang, Kazuhiro Kawamura, Chialin Chang M, Kui Liu, Aaron J Hsueh. Initial and cyclic recruitment of ovarian follicles: a quarter-century update.. 2025. https://doi.org/10.1016/j.rbmo.2025.105108
Paper 9 discusses ovarian recruitment and touches upon the classical physiological phenomenon of alternate ovulation between ovaries during menstrual cycles.
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