Korean Journal of Animal Reproduction (한국가축번식학회지)
- Volume 14 Issue 4
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- Pages.281-287
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- 1990
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- 1226-5284(pISSN)
Studies on Changes of Ovarian and Placental Weight and Periods of Pregnancy by Progesterone-tube Implantation during Pregnancy in Rats
흰쥐의 번식과정에 있어서 Progesterone-tube 이식이 난소와 태반중량 및 임신기간에 미치는 영향
Abstract
This study was conducted to find out the changes of ovarian, placental and fetal weights and periods of pregnancy in rats implanted with progesterone-tube during the reproductive stages. One hundred and thirty-four mature rats, 10~13 weeks old, were offered for this experiment. The animals, which were implanted with silicon tubes filled with progesterone on day 15 of pregnancy, were sacrified at 18, 20, 21 and 22 days of pregnancy. The changes of ovarian, placental and fetal weights and the number of fetuses during late pregnancy were recorded. The results obtained were summarized as follows : 1. After progesterone-tube implantation, ovarian weight reached to a peak value of 92.0