Haematic Mummification in a Mare With Twin Pregnancy

Pizzigatti, Dietrich; Batista, Fernando Arévalo; Martins, Charles Ferreira; Müller, Thiago Rinaldi; Hussni, Carlos Alberto

doi:10.1016/j.jevs.2011.09.071

Cited by 3 publications

(2 citation statements)

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“…Type C twinning begins as type A twinning, but then the smaller twin dies and is mummified (Roberts 1962;Vandeplassche et al 1965;Jeffcott and Whitwell 1973;Roberts 1978;Whitwell 1980) (Fig 1), usually during the second half of pregnancy (Saier et al 1975;Jauniaux et al 1988). Mummification is a process of sterile nonoxidising putrefaction, in which all the liquids from the mummy are absorbed, leaving a leathery mass (Roberts 1962;Threfall 2005;Pizzigatti et al 2012;LeFebvre 2015). Although the histology of the placenta in twinning has been described (Jeffcott and Whitwell 1973;Ball et al 1993;Govaere et al 2008), to our knowledge, this is the first extensive histological description of type C twinning in which the death of one foal had not been induced.…”

Section: Introductionmentioning

confidence: 95%

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Large placental area of degeneration in a twin pregnancy in a mare (Equus caballus)

Rapacz-Leonard

Paździor-Czapula

2020

Equine Veterinary Education

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Summary A primiparous mare foaled a live foal and a mummy. The mummy and its fetal membranes were necrotic and had been invaginated within the fetal membranes of the live foal. Near the mummy, the fetal membranes of the live foal had a clear demarcation between a ‘white’ and a ‘red’ region. The white region was touching the mummy, and some of its features were similar to those of a fetal–foot placental area of degeneration (PAD): it was ischaemic and degenerate (as indicated by hypoplasia, hyaline degeneration, multifocal squamous metaplasia, cell swelling and basement membrane sclerosis) with villi that were shorter than normal and limited in number. However, the PAD in this case was thinner than those in previous reports, and it was much larger, as it surrounded the entire mummy. The red region, which was touching the maternal endometrium, was hyperaemic, but in other respects, it was similar to the fetal membranes in the other uterine horn. To the authors’ knowledge, this is the first extensive report on the histology of type C twinning (i.e. with a mummified foal) in which the death of one foal had not been induced.

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Section: Introductionmentioning

confidence: 95%

“…Mummification is a process of sterile nonoxidising putrefaction, in which all the liquids from the mummy are absorbed, leaving a leathery mass (Roberts 1962; Threfall 2005; Pizzigatti et al . 2012; LeFebvre 2015). Although the histology of the placenta in twinning has been described (Jeffcott and Whitwell 1973; Ball et al .…”

Section: Introductionmentioning

confidence: 99%