Afterwards, the plates with oocytes were placed in a small plastic bag
(25cm×15 cm), where a gaseous mixture was injected (5% O2, 5% CO2 and 90% N2) through an 18-
gauge needle. Cleavage was recorded 36 hpi. Blastocyst formation rates were recorded on day 8 post
insemination while hatching rateswere noted on day 10 (only for Experiment 2). Culturemediumwas
replaced 48 and 120 hpi.