Progesterone and oestradiol-17 concentration profiles throughout the reproductive cycle in harbour seals (Phoca vitulina)
Serum samples of harbour seals kept in captivity were analysed for progesterone and oestradiol-17β. The hormone profiles obtained were used to describe a complete reproductive cycle. A clear peak in oestradiol values, indicative of ovulation, was followed by elevated concentrations of progesterone....
Published in: | Reproduction |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1990
|
Subjects: | |
Online Access: | https://research.wur.nl/en/publications/progesterone-and-oestradiol-17-concentration-profiles-throughout- https://doi.org/10.1530/jrf.0.0900403 |
id |
ftunivwagenin:oai:library.wur.nl:wurpubs/556622 |
---|---|
record_format |
openpolar |
spelling |
ftunivwagenin:oai:library.wur.nl:wurpubs/556622 2024-02-04T10:01:01+01:00 Progesterone and oestradiol-17 concentration profiles throughout the reproductive cycle in harbour seals (Phoca vitulina) Reijnders, P.J.H. 1990 application/pdf https://research.wur.nl/en/publications/progesterone-and-oestradiol-17-concentration-profiles-throughout- https://doi.org/10.1530/jrf.0.0900403 en eng https://edepot.wur.nl/508176 https://research.wur.nl/en/publications/progesterone-and-oestradiol-17-concentration-profiles-throughout- doi:10.1530/jrf.0.0900403 info:eu-repo/semantics/openAccess (c) publisher Wageningen University & Research Journal of reproduction and fertility 90 (1990) 2 ISSN: 0022-4251 Harbour seal Oestradiol Progesterone info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 1990 ftunivwagenin https://doi.org/10.1530/jrf.0.0900403 2024-01-10T23:30:24Z Serum samples of harbour seals kept in captivity were analysed for progesterone and oestradiol-17β. The hormone profiles obtained were used to describe a complete reproductive cycle. A clear peak in oestradiol values, indicative of ovulation, was followed by elevated concentrations of progesterone. Implantation probably occurred 3–3·5 months thereafter. Progesterone concentrations rose significantly in the last 3–4 months of gestation, whereas oestradiol concentrations gradually increased after implantation. Lactational oestrus was marked by a peak of oestradiol on average 25 days after parturition and lactation lasted 4–5 weeks. Previous pregnancy had a marked influence on the timing of oestrus; females with offspring started a new reproductive cycle about 14 days later than previously non-pregnant seals. No differences in timing of parturition between the 2 groups were observed. This was probably the result of a flexible period of delayed implantation. Article in Journal/Newspaper harbour seal Phoca vitulina Wageningen UR (University & Research Centre): Digital Library Reproduction 90 2 403 409 |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
Harbour seal Oestradiol Progesterone |
spellingShingle |
Harbour seal Oestradiol Progesterone Reijnders, P.J.H. Progesterone and oestradiol-17 concentration profiles throughout the reproductive cycle in harbour seals (Phoca vitulina) |
topic_facet |
Harbour seal Oestradiol Progesterone |
description |
Serum samples of harbour seals kept in captivity were analysed for progesterone and oestradiol-17β. The hormone profiles obtained were used to describe a complete reproductive cycle. A clear peak in oestradiol values, indicative of ovulation, was followed by elevated concentrations of progesterone. Implantation probably occurred 3–3·5 months thereafter. Progesterone concentrations rose significantly in the last 3–4 months of gestation, whereas oestradiol concentrations gradually increased after implantation. Lactational oestrus was marked by a peak of oestradiol on average 25 days after parturition and lactation lasted 4–5 weeks. Previous pregnancy had a marked influence on the timing of oestrus; females with offspring started a new reproductive cycle about 14 days later than previously non-pregnant seals. No differences in timing of parturition between the 2 groups were observed. This was probably the result of a flexible period of delayed implantation. |
format |
Article in Journal/Newspaper |
author |
Reijnders, P.J.H. |
author_facet |
Reijnders, P.J.H. |
author_sort |
Reijnders, P.J.H. |
title |
Progesterone and oestradiol-17 concentration profiles throughout the reproductive cycle in harbour seals (Phoca vitulina) |
title_short |
Progesterone and oestradiol-17 concentration profiles throughout the reproductive cycle in harbour seals (Phoca vitulina) |
title_full |
Progesterone and oestradiol-17 concentration profiles throughout the reproductive cycle in harbour seals (Phoca vitulina) |
title_fullStr |
Progesterone and oestradiol-17 concentration profiles throughout the reproductive cycle in harbour seals (Phoca vitulina) |
title_full_unstemmed |
Progesterone and oestradiol-17 concentration profiles throughout the reproductive cycle in harbour seals (Phoca vitulina) |
title_sort |
progesterone and oestradiol-17 concentration profiles throughout the reproductive cycle in harbour seals (phoca vitulina) |
publishDate |
1990 |
url |
https://research.wur.nl/en/publications/progesterone-and-oestradiol-17-concentration-profiles-throughout- https://doi.org/10.1530/jrf.0.0900403 |
genre |
harbour seal Phoca vitulina |
genre_facet |
harbour seal Phoca vitulina |
op_source |
Journal of reproduction and fertility 90 (1990) 2 ISSN: 0022-4251 |
op_relation |
https://edepot.wur.nl/508176 https://research.wur.nl/en/publications/progesterone-and-oestradiol-17-concentration-profiles-throughout- doi:10.1530/jrf.0.0900403 |
op_rights |
info:eu-repo/semantics/openAccess (c) publisher Wageningen University & Research |
op_doi |
https://doi.org/10.1530/jrf.0.0900403 |
container_title |
Reproduction |
container_volume |
90 |
container_issue |
2 |
container_start_page |
403 |
op_container_end_page |
409 |
_version_ |
1789966627794583552 |