Fetal membranes and placentation in Chiroptera
نویسندگان
چکیده
منابع مشابه
The evolution of fetal membranes and placentation in carnivores and ungulates (Ferungulata)
Molecular phylogenetics has made a substantial contribution to our understanding of the relationships between mammalian orders and has generated trees that can be used to examine the evolution of anatomical and physiological traits. We here summarize findings on fetal membranes and placentation in Ferungulata, a clade comprising carnivores, pangolins, and evenand odd-toed ungulates. Their early...
متن کاملPlacentation and fetal membrane development in the South American coati, Nasua nasua (Mammalia, Carnivora, Procyonidae)
BACKGROUND Placental research in carnivores has concentrated on domestic species, which have zonary, labyrinthine placentas with an endotheliochorial barrier. Although the coati, Nasua nasua, is a widely distributed species in South America, data on the development of the placenta and the fetal membranes in this species are very sparse. FINDINGS Four placentas from mid-gestation to near term ...
متن کاملPlacentation in the African elephant, Loxodonta africana. IV. Growth and function of the fetal gonads.
The gonads, both ovaries and testes, of 44 elephant fetuses weighing 0.09-112 kg (6.1-21.3 months gestation) were examined grossly and histologically. As in equids, elephant fetal gonads undergo a phase of marked growth and enlargement during the second half of gestation, which is more pronounced in ovaries than testes due to growth and antrum formation of numerous follicles in the former. Stro...
متن کاملThe matrix metalloproteinases (MMPS) in the decidua and fetal membranes.
The role of the matrix metalloproteinases (MMPs) in the decidua, fetal membranes and amniotic fluid (AF) has been receiving more and more attention. The MMPs are not only important intermediaries in pathological processes leading to preterm labor but it seems that they also play a crucial role in the activation of labor at term. During normal gestation MMP-1, -2, -3, -7 and -9 are found in the ...
متن کاملRetention of Fetal Membranes and its Clinical Perspective in Bovines
Retention of the fetal membranes (RFM) or Retention of Placenta (ROP) in the cow is normally defined as the condition in which the fetal membranes are not expelled within a period of 12 hours after expulsion of the fetus. Primary retention of fetal membranes results from a lack of detachment from the maternal caruncles whereas secondary retention is related to a mechanical difficulty in expelli...
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ژورنال
عنوان ژورنال: Reproduction
سال: 1979
ISSN: 1470-1626,1741-7899
DOI: 10.1530/jrf.0.0560417