How Successful Is the Drug-Free IVM Method?

IVM (in vitro maturation) is an IVF variant where immature eggs are collected from unstimulated or minimally stimulated ovaries, then matured in the laboratory over 24–48 hours before fertilisation. It significantly reduces the need for hormonal medications.

IVM is particularly suitable for women with polycystic ovary syndrome (PCOS) — who have many immature follicles and are at high risk of OHSS with conventional stimulation — as well as those seeking to minimise medication exposure or with hormone-sensitive conditions.

Success rates with IVM are generally 5–15% lower per cycle than conventional IVF, as not all matured eggs have the same developmental potential as naturally matured ones. However, for PCOS patients, outcomes are closer — and avoiding OHSS is a significant additional benefit.

IVM requires minimal or no ovarian stimulation, significantly reducing medication costs, injection burden, side effects, and the risk of ovarian hyperstimulation syndrome (OHSS). It also allows a faster start to treatment without the pre-treatment cycle needed for some protocols.

Yes. IVM is particularly valuable for urgent fertility preservation (e.g., before cancer treatment) when there is no time for a full stimulation cycle, or for women where hormonal stimulation is contraindicated (e.g., oestrogen-sensitive cancers).