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1 August 2002 Full-Term Development of Golden Hamster Oocytes Following Intracytoplasmic Sperm Head Injection
Yasuhiro Yamauchi, Ryuzo Yanagimachi, Toshitaka Horiuchi
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Abstract

The golden hamster is the mammalian species in which intracytoplasmic sperm injection (ICSI) was first tried to produce fertilized oocytes. Thus far, however, there are no reports of full-term development of hamster oocytes fertilized by ICSI. Here we report the birth of hamster offspring following ICSI. Keys to success were 1) performing ICSI in a dark room with a small incandescent lamp and manipulating both oocytes and fertilized eggs under a microscope with a red light source and 2) injecting sperm heads without acrosomes. All oocytes injected with acrosome-intact sperm heads died within 3 h after injection, while those oocytes injected with acrosomeless sperm heads survived injection. Under illumination with red light in a dark room, the majority of the oocytes injected with acrosomeless sperm heads were fertilized normally (77%), cleaved (91%), and developed into morulae (49%). Of the 47 morulae transferred to five recipient females, nine (19%) developed to live offspring.

Yasuhiro Yamauchi, Ryuzo Yanagimachi, and Toshitaka Horiuchi "Full-Term Development of Golden Hamster Oocytes Following Intracytoplasmic Sperm Head Injection," Biology of Reproduction 67(2), 534-539, (1 August 2002). https://doi.org/10.1095/biolreprod67.2.534
Received: 4 October 2001; Accepted: 1 March 2002; Published: 1 August 2002
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