 Embryos in arm 2 of the study Miri TL incubator will be morphologically and morphokinetically assessed by the same laboratory embryologists using digital images generated by the incubators integrated time-lapse imaging system. Assessment and scoring will be performed as per our scoring classification system. Morphological screening of embryos will initially be performed in order to discard or exclude those clearly not viable for transfer. Morphokinetic parameters will then be used in order to rank remaining embryos score categories from a maximum of 4.0 to a minimum of -2.0, in order of hypothesized decreasing implantation potential. 