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From Embryology

Table 5. Volumes of vitellus in different species

Average internal Average diameter Volume of diameter of zona ovarian of

Average volume of vitellus in cu.y pellucida ovum vitellus - —-* 7 Type Observer (zn) (cu.p) (2) 1-cell 2-cell 4-cell 8-cell

Morula Ungulate: Cow Present series 138-4 — 120 919,500 1,071,750 729,000 741,500 —_ Cow Hartman et al. 143 1,537,000 120 907,200 —_— —_— — —_ — 1,298,000 — — 679,000 _ _ _ 135 1,600,000 — — _ —_ _ — Goat Amoroso et al. 145-3 1,615,000 132 1,204,000 — — —_ —_ Sheep Calculated from 147 1,663,000 — 1,056,000 919,000 712,200 615,700 _ Clark Pig Heuser & Streeter 130 1,150,400 111 716,090 — — — —_

Primate: Lewis& Hartman 125-143 1,000,000- 140 549,000 562,000 527,000 546,000 — (Macacus 1,633,000 (3 eggs) (3 eggs) rhesus)

Rodent: Mouse Lewis & Wright 87-8 254,000 71-6 192,000 158,000 162,000 138,000 219,000 Ferret Hamilton 153° 1,876,000 124 1,003,000 881,249 842,000 737,000