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Submitted by Dr. Hesham Al-Inany, M.D. Lecturer, Gynaecology & Obstetrics dept. Kasr El-Aini hospital, Cairo University, Egypt.

Micromanipulation
 

During Gamete Micromanipulation sperms are injected into an ovum to assist in union of the gametes.

 
 

 
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Gametogenesis: a basic review
Anomalies of the female genital tract

 
   
 
     

Historical Review

Micromanipulation procedures are applied to embryos and gametes in which careful manipulation can be performed with micropipettes under vision via the microscope. The first sperm-egg injection experiments were described by Hiramoto (1962) in the sea urchin , and the first mammalian egg injection was described by Lin (1966) in the mouse. Uehera and Yanagimachi (1976) reported the microinjection of human and golden hamster sperm into hamster egg . Good recent reviews of the subject were given by Markert (1983) and Kishimoto (1986) who also reviewed sperm microinjection into starfish eggs (Ng et al, 1989).
The term microfertilization was used by Trounson(1987) but the first human report came from Metka, et al (1985) who injected single sperm into nine human oocytes. The first human pregnancy after micromanipulation has been reported by Ng et al (1988).
Over the last five years , various micromanipulation strategies have been suggested for promoting sperm-egg fusion.

 

These fall into three basic categories:

(I) The direct injection of single spermatozoon into the ooplasm (ICSI).
(II) The placement of spermatozoa into the perivitilline space (SUZI).
(III) Partial zona pellucida dissection (PZD).

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