Studies on reproduction in the goat. VII. Pregnancy and the development of the foetus and the foetal accessories of the goat

山羊繁殖研究. VII. 山羊的妊娠、胎儿发育及胎儿附属器官

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Abstract

1. A total of 18 goats were ovariohysterectomized at different stages — 26 days to 145 days — of pregnancy. 2. The amniotic fluid increases from about 3.5 ml at 30 days to 600–1,000 ml per foetus at birth. 3. At birth the amount of allantoic fluid is approximately 600–1,100 ml and is to a small extent dependent on the number of foetuses. 4. The length of the foetus is about 1.4 cm at 30 days and 43 cm at 145 days, the lengthwise growth curve from the 30th day and onward being almost linear. 5. Hair follicles are visible around the 60th day and the eyes open between the 130th and 140th day. 6. The average length and weight of the goat kids at birth are 42.06 cm and 2.81 kg respectively. 7. The birth weight and length tend to increase with the increasing age of the dam. 8. The male does not appear to have any influence on the birth weight and length of the offspring.

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