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Figure 6 | Journal of Ovarian Research

Figure 6

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

Figure 6

Zygote scoring system of Gianaroli et al. [19]. They identified 5 different patterns according to PN morphology: (i) juxtaposed and centralized (A), (ii) juxtaposed and peripheral (B), (iii) centralized and separated (C), (iv) unequal size (D), and (v) fragmented (E). At regard to nucleolar morphology, 4 different patterns were proposed: (i) large size, aligned (F), (ii) large sized scattered in both PN (G), (iii) large size, aligned in one PN and scattered in the other (H), (iv) small size in at least one PN, scattered (I). Finally, the orientation of polar bodies was described in relation to the longitudinal axis of PN: (i) the longitudinal axis (L); (ii) perpendicular to the longitudinal axis (M); (iii) in different position (N).

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