caa a22 4500 469127481 CHVBK 20180323133154.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF02356754 doi (NATIONALLICENCE)springer-10.1007/BF02356754 Plasma progesterone concentrations during pregnancy and pseudopregnancy and onset of ovarian activity Post partum in indigenous goats in Zimbabwe [Elektronische Daten] [C. Llewelyn, J. Ogaa, M. Obwolo] Summary: Eight pregnant does were housed individually and fed a hay and concentrate diet throughout pregnancy and lactation. The mean gestation period was 146·7±3·0 days, with a twinning rate of 75 per cent. Mean body condition scores improved from 2·4±0·2 to 2·8±0·2 over the first 80 days of gestation and were maintained at 2·8 until 45 days before kidding. From then until kidding, mean scores fell to 2·2±0·2. Plasma progesterone concentrations during pregnancy rose significantly from 3·91±0·51 ng/ml on day 40 to 5·96±0·51 ng/ml on day 60 (P<0·05) and remained high until 5 days before kidding. Three pseudopregnant does had similar progesterone profiles to pregnant does over the first 80 days, but the rise around day 35 to 40 was not significant and progesterone concentrations returned gradually to basal levels after day 100. The same 8 does, together with an additional 4 does which had been brought inside 60 to 70 days before kidding, were used to study onset of ovarian activitypost partum. The twinning percentage was 83 per cent. Mean body condition score at parturition was 2·2±0·1. By day 35post partum, mean condition scores had fallen to 1·9±0·1, and mean weights from 36·9±1·9 kg at kidding to 32·1±2·0 kg. Ovarian cyclicity was resumed just before mean scores and weights started to improve. The mean interval from kidding to onset of oestrous cycles was 97·3±9·5 days. This coincided with mean time to weaning which was 99·5±5·5 days. It is suggested that suckling and body condition regulate the length of post-partum anoestrus in this species. Season may also play a regulatory role, since does kidding in April to June (n=6) were anoestrus for 82·7±15·0 days compared to 112±7·3 days for does kidding in October to February (n=6), although the difference was not significant. Centre for Tropical Veterinary Medicine, 1992 Llewelyn C. Department of Animal Science, University of Zimbabwe, Mount Pleasant MP 167, Harare, Zimbabwe aut Ogaa J. Faculty of Veterinary Science, University of Zimbabwe, Mount Pleasant MP 167, Harare, Zimbabwe aut Obwolo M. Faculty of Veterinary Science, University of Zimbabwe, Mount Pleasant MP 167, Harare, Zimbabwe aut Tropical Animal Health and Production Kluwer Academic Publishers 24/4(1992-12-01), 242-250 0049-4747 24:4<242 1992 24 11250 https://doi.org/10.1007/BF02356754 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02356754 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Llewelyn C. Department of Animal Science, University of Zimbabwe, Mount Pleasant MP 167, Harare, Zimbabwe aut NATIONALLICENCE 700 1- Ogaa J. Faculty of Veterinary Science, University of Zimbabwe, Mount Pleasant MP 167, Harare, Zimbabwe aut NATIONALLICENCE 700 1- Obwolo M. Faculty of Veterinary Science, University of Zimbabwe, Mount Pleasant MP 167, Harare, Zimbabwe aut NATIONALLICENCE 773 0- Tropical Animal Health and Production Kluwer Academic Publishers 24/4(1992-12-01), 242-250 0049-4747 24:4<242 1992 24 11250 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer