Fertility and Sterility, vol. 95, no. 8, pp. 2582-2584
Metaphase II oocyte production was significantly increased by treatment with E2 during the first half of the total in vitro maturation (IVM) period, which was further evidenced by an increase in monospermic fertilization, blastocyst formation, or blastomere viability of IVF- or somatic cell nuclear transfer-derived embryos. Thus, we concluded that transient E2 supplementation could improve the IVM rate and subsequent developmental competence in pigs.