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The optimal time for intracytoplasmic sperm injection in the human is from 37 to 41 hours after administration of human chorionic gonadotropin.

Dozortsev D, Nagy P, Abdelmassih S, Oliveira F, Brasil A, Abdelmassih V, Diamond M, Abdelmassih R

Clinica e Centro de Pesquisa em Reproducao Humana Roger Abdelmassih, São Paulo, Brazil. dmitri@dozortsev.net

Fertilization rates increased continuously with the time elapsed after administration of hCG, reaching a peak of 84% when intracytoplasmic sperm injection (ICSI) was performed >41 hours after hCG administration. However, the highest implantation rate, 24%, was achieved when ICSI was performed 37-41 hours after hCG administration.

Published 13 December 2004 in Fertil Steril, 82(6): 1492-6.
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