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Uterine proteins in the marsupial, Didelphis Marsupialis virginiana, during gestation.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Renfree, Marilyn B. |
| Copyright Year | 1975 |
| Abstract | TheNorth American opossum, Didelphis marsupialis virginiana, is a polyovular, polyoestrous marsupial. The gestation period of 13 days is the same length as the luteal phase of the cycle (Hartman, 1923, 1925); the next pro-oestrous phase and ovulation are suppressed by the presence of sucking young in the pouch. During the breeding season, removal or loss of the young results in resumption of follicular growth and oestrous behaviour is evident 3 to 7 days later (Hartman, 1923; Renfree, 1974). After ovulation, the two uteri increase greatly in size and turgidity, due to an accumulation of fluid in the hypertrophied mucosa and the development of a rich supply ofcapillaries and venules (Harman, 1923). Ciliated surface cells are involved in the deposition of much ground substance in the stroma, and the secretory cells of the glands have abundant smooth and rough endoplasmic reticulum as well as expanded Golgi apparatus: in pregnancy, both transport and secretory cells are prominent and are presumed to supply the fetus with haemotrophe and histotrophe (Padykula & Taylor, 1971). The present communication describes the protein components of this embryotrophe and the weight changes in the endometrium throughout gestation. Three of the ovariectomized females that carried their fetuses to term during a previous study (Renfree, 1974) were included for comparison. Opossums were collected and housed as already described (Renfree, 1974). Fetal fluids from three pregnant opossums, and the endometrium from twentysix uterine horns of twenty animals were collected by methods used previously for the tammar wallaby, Macropus eugenii (Renfree, 1973a, b). The endo¬ metrium and uterine exudates were also collected from the uteri of five nonpregnant females at Days 2, 4, 5 and 8 after oestrus. Maternal plasma was collected at laparotomy or autopsy by cardiac puncture, and all samples were stored at |
| Starting Page | 641 |
| Ending Page | 646 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://rep.bioscientifica.com/downloadpdf/journals/rep/42/1/jrf_42_1_023.pdf |
| PubMed reference number | 1110467v1 |
| Volume Number | 42 |
| Issue Number | 1 |
| Journal | Journal of reproduction and fertility |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Breeding Cell secretion Didelphidae Didelphis virginiana ER to Golgi vesicle-mediated transport Endometrium Estrus Exudate Fetus Gland Horns Hypertrophy Liquid substance Luteal Phase Macropus |
| Content Type | Text |
| Resource Type | Article |
