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British Medical Bulletin 46:596-615 (1990)
© 1990 The British Council

research-article

Induction of multiple follicular development for IVF

R Fleming and JRT Coutts

Royal Infirmary Glasgow, UK

Abstract

It is now accepted, almost universally, that multiple follicular development is a pre-requisite for a successful assisted conception programme. The reasons for this are based on abundant clinical evidence from the major IVF and GIFT centres of the world indicating the benefits of having multiple gametes available for transfer. The more embryos transferred, the better the pregnancy rate;1 the more embryos available for cryopreservation the better the chances of subsequent survival and replacement. However, the vast majority of patients in IVF/GIFT programmes have normal ovarian and pituitary function designed to produce a single dominant follicle and oocyte each month. Obtaining multiple follicular growth requires pharmacological manipulation of ovarian function and complicating factors may arise from both ovarian and pituitary sources.

Methods employed to achieve multiple follicular growth vary considerably in the different centres and experiments continue in attempts to find either the simplest or the perfect system, or both. This would provide abundant oocytes and the ideal hormone environment for implantation, with no interfering factors at either the ovarian or endometrial level, while avoiding the drawbacks commonly encountered such as pre-operative ovulation or hyperstimulation syndrome. It should also be inexpensive, although in reality cost-effectiveness is more important.


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