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Subject: Veterinary Anatomy × End date: 2009 × Start date: 2001 ×
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    ThesisItemOpen Access
    Histological and Histochemical studies on the placentomes of the buffalo (Bubalus bubalis)
    (2008) PRASANTH BABU, A; Chandrasekhara Rao, T.S(Major); Srilatha, Ch.; Suresh Kumar, R.V
    ABSTRACT : The study was made on 220 samples of buffalo placentomes belonging to 66 age groups starting from 37 days to 255 days of pregnancy to study the histological and histochemical aspects of the placentomes. The placentomes were categorized 23 into following three groups viz. Early pregnancy (38 days to 3rd month), mid pregnancy (4th month to 6th month) and late pregnancy (7th month to 8 month 15 days). The placenta of buffalo can be classified as epitheliochorial type as maternal epithelium is intact and is in close apposition with trophoblastic epithelium. It is synepitheliochorial sub type as migration and fusion of trophoblastic originating giant cells with maternal epithelium is observed. However patches of syndesmochorial arrangement were also seen due to denudation of maternal epithelium during early and mid pregnancies particularly at the tips of intercrypt columns. A firm attachment between foetal and maternal components was observed from 61 days of pregnancy onwards. During late pregnancy the foetal and maternal parts of the placentomes were gradually separated from each other. Extensive branching of crypts was observed from 64 days of pregnancy onwards. Secondary and tertiary branching of villi was observed at 70 and 87 days of pregnancy respectively. During late pregnancy extensive ramifications of foetal villi were observed. 24