Follicular development in lactating, post weaning and anoestrous primiparous sows
The ovarian follicular system was studied in 4 lactating sows (6 or 8 weeks lactation period), 4 post weaning sows (2 or 4 days after weaning) and 5 post weaning anoestrous sows (22 days after weaning) by macroscopical and microscopical examinations. Blood sampling was performed daily in the post we...
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| Published in: | Acta veterinaria scandinavica Vol. 28; no. 3-4; pp. 421 - 427 |
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| Main Authors: | , , |
| Format: | Journal Article |
| Language: | English |
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England
BioMed Central
01-01-1987
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| Abstract | The ovarian follicular system was studied in 4 lactating sows (6 or 8 weeks lactation period), 4 post weaning sows (2 or 4 days after weaning) and 5 post weaning anoestrous sows (22 days after weaning) by macroscopical and microscopical examinations. Blood sampling was performed daily in the post weaning anoestrous sows. The results showed that none of the sows had ovulated during lactation and after weaning. Only small and medium sized follicles were present in the ovaries of the sows. The blood levels of oestradiol-17β and progesterone were low throughout the post weaning period in the anoestrous sows. Microscopical examination showed that all sows had more normal than atretic follicles. In the lactating sows all follicles were below 5 mm in size, the majority being small (1.00–2.99 mm in diameter). The post weaning sows had follicles up to 5.00–5.99 mm and 23–24% of the follicles were medium sized (3.00–5.99 mm in diameter). The post weaning anoestrous sows had no follicles above 5 mm in diameter but many normal medium sized follicles. |
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| AbstractList | The ovarian follicular system was studied in 4 lactating sows (6 or 8 weeks lactation period), 4 post weaning sows (2 or 4 days after weaning) and 5 post weaning anoestrous sows (22 days after weaning) by macroscopical and microscopical examinations. Blood sampling was performed daily in the post weaning anoestrous sows. The results showed that none of the sows had ovulated during lactation and after weaning. Only small and medium sized follicles were present in the ovaries of the sows. The blood levels of oestradiol-17β and progesterone were low throughout the post weaning period in the anoestrous sows. Microscopical examination showed that all sows had more normal than atretic follicles. In the lactating sows all follicles were below 5 mm in size, the majority being small (1.00–2.99 mm in diameter). The post weaning sows had follicles up to 5.00–5.99 mm and 23–24% of the follicles were medium sized (3.00–5.99 mm in diameter). The post weaning anoestrous sows had no follicles above 5 mm in diameter but many normal medium sized follicles. |
| Author | Rojanasthien, S Settergren, I Einarsson, S |
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| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/3454552$$D View this record in MEDLINE/PubMed |
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| Cites_doi | 10.1016/0010-7824(76)90119-0 10.1016/0093-691X(83)90072-9 10.1016/0039-128X(73)90060-3 10.1111/j.1439-0442.1983.tb01024.x 10.1677/joe.0.0640141 10.2527/jas1958.173862x 10.1186/BF03547270 10.1016/0378-4320(82)90036-7 10.1530/jrf.0.0750017 10.1016/0378-4320(82)90035-5 10.2527/jas1950.9166 10.1186/BF03546736 10.1136/vr.85.8.208 10.1095/biolreprod33.2.375 10.2527/jas1965.242541x 10.1095/biolreprod27.1.70 |
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| References | IF Burger (BF03548610_CR7) 1952; 2 K Karlberg (BF03548610_CR12) 1980; 32 C Linde (BF03548610_CR18) 1984; 36 G Radev (BF03548610_CR21) 1976 R H King (BF03548610_CR14) 1982; 5 Η J Shaw (BF03548610_CR25) 1985; 75 J D Armstrong (BF03548610_CR3) 1985; 33 A C Warnick (BF03548610_CR26) 1950; 9 R W Ash (BF03548610_CR4) 1975; 64 Ν Μ Cox (BF03548610_CR9) 1983; 20 G D Dial (BF03548610_CR10) 1984; 45 A Kunavongkrit (BF03548610_CR16) 1982; 5 Η L Self (BF03548610_CR24) 1958; 17 S Einarsson (BF03548610_CR11) 1974; 11 C W Maclean (BF03548610_CR19) 1969; 85 A Kunavongkrit (BF03548610_CR15) 1984; 25 W Τ K Bosu (BF03548610_CR6) 1976; 13 A-M Andersson-Dalin (BF03548610_CR2) 1984; 36 B Boilert (BF03548610_CR5) 1973; 22 G M Almond (BF03548610_CR1) 1986 G J King (BF03548610_CR13) 1978 W M Palmer (BF03548610_CR20) 1965; 24 A Kunavongkrit (BF03548610_CR17) 1983; 30 Ν Μ Cox (BF03548610_CR8) 1982; 27 H Rodriguez (BF03548610_CR23) 1983; 24 E Rajakoski (BF03548610_CR22) 1960; 52 |
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| SubjectTerms | Anestrus - physiology Animals Estrus - physiology Female Lactation - physiology Ovarian Follicle - physiology Pregnancy Swine - physiology Weaning |
| Title | Follicular development in lactating, post weaning and anoestrous primiparous sows |
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