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Microencapsulation of single, multiple, and zona pellucida-free mouse preimplantation embryos in sodium alginate and their development in vitro

Summary. Preimplantation embryos obtained from immature superovulated B6D2F1 female mice were microencapsulated in sodium alginate singly, in multiples of 2 or 3, or denuded of their zona pellucida. Encapsulated embryos developed in vitro at a rate similar to control embryos. Development of zona pellucida-free embryos was significantly less than that of intact embryos, but there was no difference between encapsulated and non-encapsulated zona pellucida-free embryos. Development of 2- and 4-cell embryos in sodium alginate was independent of cell stage. This report demonstrates the usefulness of a viable, biodegradable embedding material for the microencapsulation of manipulated preimplantation mammalian embryos.

Keywords: embryo; microencapsulation; sodium alginate; zona pellucida; mouse

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