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| Smok S,Carolina; Rojas R,Mariana. |
| Ovogenesis and foliculogenesis in the mare differ from other farm animals and therefore, gamete manipulation, in vitro fertilization and embryo transfer have been very difficult. The histologic traits of ovaries from 12 mares, in estrus and diestrus were studied. Number and size of follicules and corpora lutea were recorded. The ovarian stroma was evaluated using the pricosirius technique for collagen. A simple morphometric analysis was done using computerized scanner programs. During late estrus, one dominant follicle (46 ± 4mm) is seen. The surrounding stroma contains collagen I and III. By the end of the estrus, one hemorrhagic follicle is seen, plus one or two small follicle (2 mm in size). In early diestrus there is a corpus luteum (43-60 mm) and some... |
| Tipo: Journal article |
Palavras-chave: Follicle; Stroma; Mare ovary; Seasonality. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000300007 |
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| Roa,Ignacio; Smok S,Carolina; Prieto G,Ruth. |
| La placenta, anexo embrionario propio de los mamíferos placentados, imprescindible para la supervivencia embriofetal, está formada por la zona más superficial del endometrio y el corion, asociado con el saco vitelino o el alantoides, dependiendo de la especie. La placenta provee el intercambio gaseoso y nutricio entre la madre y el feto, secreta hormonas y posee propiedades inmunosupresoras. Existen diferentes criterios para clasificar la placenta; de acuerdo a la distribución de las vellosidades coriales de la placenta: difusa, cotiledonaria, zonaria y discoidal; de acuerdo a las características histológicas de la placenta: epiteliocorial, sindesmocorial, endoteliocorial y hemocorial. |
| Tipo: Journal article |
Palavras-chave: Placenta; Morfología comparada. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400036 |
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