Hyperovulation induction agents increase the natural chance of conceiving twins
Clinical evidence consistently demonstrates that hyperovulation induction agents, such as clomiphene citrate, stimulate the development of multiple dominant follicles, thereby significantly increasing the chance of conceiving twins or higher-order multiples compared to natural cycles.
The retrieved literature thoroughly documents that agents used for ovulation induction (such as clomiphene citrate) intentionally stimulate multiple follicular development to treat infertility, which inherently raises the probability of multifetal gestation (twins or more) compared to unmedicated natural cycles. Multiple papers (e.g., [0], [1], [4], [6]) explicitly support this causal link. None of the papers refute it.
Adam Balen, Lara Morley, Marie Misso, Stephen Franks, Richard S. Legro, Chandrika Wijeyaratne, Elisabet Stener‐Victorin, Bart C.J.M. Fauser, Robert J. Norman, Helena Teede. The management of anovulatory infertility in women with polycystic ovary syndrome: an analysis of the evidence to support the development of global WHO guidance. 2016. https://doi.org/10.1093/humupd/dmw025
Paper [0] highlights that pharmacological ovulation induction achieves good pregnancy rates but warns that multiple pregnancy risks must be managed and discussed with patients.
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Robert F. Casper, M.F. Mitwally. Aromatase Inhibitors for Ovulation Induction. 2006. https://doi.org/10.1210/jc.2005-1923
Paper [1] notes that clomiphene citrate carries a significant risk of multiple pregnancy compared to natural cycles.
Applebaum J, Ginsburg ES. Optimizing the therapeutic donor insemination cycle.. 2026. https://doi.org/10.1016/j.fertnstert.2026.06.033
Paper [4] finds that the addition of oral ovulation induction agents significantly increases the risk of multiple gestation.
Tadesse TM. Clomiphene citrate in the management of anovulation: a review of mechanisms, outcomes, and clinical challenges.. 2026. https://doi.org/10.1080/09513590.2026.2646774
Paper [6] reports a notable risk of multiple pregnancies (8%-10%) associated with clomiphene citrate ovulation induction.
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