Hutchison G, Mellor D J
J Comp Pathol. 1983 Oct;93(4):577-83. doi: 10.1016/0021-9975(83)90064-6.
The initiation of secondary (S) wool follicles usually takes place between about 95 and 135 days of gestation. Severe underfeeding during the first half of this period did not significantly inhibit the initiation of S follicles, but severe underfeeding during the latter half of this period resulted in a significantly lower number of S follicles and this number was not increased by refeeding ewes to a high level between 132 days and term. A similar reduction in S follicle initiation was effected when ewes were moderately underfed throughout most of pregnancy, but when the ewes were refed between 120 days of gestation and term the numbers of S follicles initiated were not significantly different from those of a group of well-fed animals. It is concluded that S follicle initiation is most affected by maternal undernutrition between about 115 and 135 days of gestation.
次级（S）毛囊的起始通常发生在妊娠约95至135天之间。在此期间的前半段严重营养不良并未显著抑制S毛囊的起始，但在此期间的后半段严重营养不良导致S毛囊数量显著减少，并且在132天至足月期间将母羊重新喂至高水平并不能增加这一数量。当母羊在整个妊娠的大部分时间里适度营养不良时，S毛囊起始也会有类似的减少，但当母羊在妊娠120天至足月期间重新喂食时，起始的S毛囊数量与一组营养良好的动物相比没有显著差异。得出的结论是，S毛囊起始在妊娠约115至135天之间受母体营养不足的影响最大。
