Talk:Paper - Cleavage Stages of the Ova of the Horse with Notes on Ovulation

Table 1

Vitellus , _ A Zona measurements Ovulat1on- ' Measure- ,——-—A—————j+ Volume killing Dosage _of Stage of ments Average Outside Average Inside Average of zonal interval Gonan 1n . development p, p. p. p. p. . p. cavity in hr. 1.u. Pony 1 Unsegmented 106 x 104 105 166 x 156 161 135 X 130 132-5 1,218,000 24-30 750 Pony 8 ,, 104 x 94 99 160 x 160 160 133 x 130 131-5 1,191,00() 78-84 10()() Pony 3 In uterus 142 x 141 141 179 x 177 178 142 x 140 141 1,469,000 144-168 1500 Shire ,, —‘ —- 166 x 160 163 141 X137 139 1,407,000 — ~ ' Thorough- Degenerating 90 X 85 87-5 160 x 156 158 121 X 112 117 839,000 — -—bred A Thorough- . ,, - —- 152 X 141 147 125 X112 119 882,500 -—— —bred B . Pony 5 2-cell -—— — 156 X 141 149 133 x 119 126 1,047,000 24 Normal oestrus Pony 2 3-cell — — — — 142 x 171 157 2,027,000 27-33 1000 Pony 7 4-cell — — 135 x 135 135 114 x 112 113 755,600 30-36 1000 Pony 4 5-cell — —— 156 >< 152 154 133 x 131 132 1,204,000 50-56 1000 Pony 6 Morula — —— 179 x 154 167 148 x 127 138 1,376,000 98 1000

• Range of diameter of vitellus 87.5 µ (degenerating egg) to 141 µ (egg recovered from uterus); in a normal egg shortly after ovulation 105 µ.
• Range of the outer diameter of zona pellucida is 135-178 µ (average diameter 157.2 µ); if the uterine egg is excluded the range is 135-l67 µ; average diameter l55 µ.
• Range of the inner diameter of zona pellucida (excluding the markedly oval egg pony no. 2) l13—141 µ, average 131 µ; if the uterine egg is again excluded the range is 113-138 µ; average measurement for 9 eggs 128 µ.