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| Titel: |
The diurnal variation in bovine urinary oestrogen excretion during late pregnancy |
| Auteur: |
Osinga, A. Schipholt, L.F. Lutke |
| Verschenen in: |
Biological rhythm research |
| Paginering: | Jaargang 1 (1970) nr. 3 pagina's 229-237 |
| Jaar: |
1970-11 |
| Inhoud: |
The circadian variation in the excretion of creatinine, oestradiol-17 α and oestrone as well as the oestrogen/creatinine ratios have been studied in 13 pregnant cows for a total of 19 complete days. Probably because of the foetal origin, the urinary oestrogen production is not subject to a significant circadian rhythm. However, a significant circadian rhythm, with low levels at night and high levels during day-time, have been shown in the maternal creatinine excretion. Consequently a reverse rhythm is demonstrated of the oestradiol-17α and oestrogen/creatinine ratios. Situations are discussed which allow, nevertheless, the use of these ratios in studies concerned with the oestrogen excretion rate in pregnant cows. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 7 van 7 gevonden artikelen
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