Skip to main content
Figure 14 | Journal of Ovarian Research

Figure 14

From: Pronuclear morphology evaluation for fresh in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) cycles: a systematic review

Figure 14

Zygote scoring system of De Placido et al. [17]. The authors combined five previous scoring systems [10, 11, 50–52] and considered 3 main parameters: (i) the position of PN in relation to the cytoplasm (A-E); (ii) the morphology and orientation of nucleoli (F-L); (iii) the presence of a dense area of the cytoplasm aggregate around the PN (cytoplasmic flare) (M-Q). Zygotes showing two opposed PN with equal size in centre of the cytoplasm, equal number of juxtaposed nucleoli and the cytoplasmic flare were considered as top quality zygotes.

Back to article page