Postpartum anoestrus in the suckled swamp buffalo

Postpartum anoestrus is a serious cause of infertility in the swamp buffalo. Our studies have revealed that it is due to a failure in the resumption of ovarian cyclicity. Parity was inversely related to the calving interval being longer in primiparous than multiparous suckled buffaloes. This effect...

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Main Authors:	Sharifuddin, W., Jainudeen, Mohamed Razeen, Yap, Keng Chee, Dahari, A. Bakar
Format:	Conference or Workshop Item
Language:	English English
Published:	IAEA 1984
Online Access:	http://psasir.upm.edu.my/id/eprint/17899/ http://psasir.upm.edu.my/id/eprint/17899/1/ID%2017899.pdf

id	upm-17899
recordtype	eprints
spelling	upm-178992013-11-20T01:06:59Z http://psasir.upm.edu.my/id/eprint/17899/ Postpartum anoestrus in the suckled swamp buffalo Sharifuddin, W. Jainudeen, Mohamed Razeen Yap, Keng Chee Dahari, A. Bakar Postpartum anoestrus is a serious cause of infertility in the swamp buffalo. Our studies have revealed that it is due to a failure in the resumption of ovarian cyclicity. Parity was inversely related to the calving interval being longer in primiparous than multiparous suckled buffaloes. This effect may be partly due to the higher nutrient demands for growth as well as for lactation in the primiparous animal. The effects of suckling on ovarian and pituitary function of postpartum buffaloes were investigated with the aid of radioimmunoassays for progesterone and luteinizing hormone (LH) as well as rectal palpation and laparoscopic inspection of the ovaries. The incidence of postpartum anoestrus was higher in suckeld than non-suckled buffaloes. Weaning buffalo calves at 30 d post partum resulted in the resumption of normal ovarian cycles within 60 d post partum. LH release in response to a single injection of a synthetic gonadotropin releasing hormone (GnRH) indicated that pituitary responsiveness to GnRH was restored by Day 30 post partum in suckled buffaloes whereas anoestrous buffaloes were able to release levels of LH comparable to that of the preovulatory surge. A progesterone-releasing intra-vaginal device (PRID) induced an anovulatory oestrus in the anoestrous suckled buffalo which was partially overcome by human chorionic gonadotropin (HCG) administered at the induced oestrus. However, a 72 h separation of the calf from its dam combined with PRID was the most effective substitute to weaning in initiating ovarian cycles in the suckled buffalo. Our data suggest that suckling inhibits ovarian function not by an effect on the pituitary gland but rather on GnRH release by the hypothalamus. IAEA 1984 Conference or Workshop Item NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/17899/1/ID%2017899.pdf Sharifuddin, W. and Jainudeen, Mohamed Razeen and Yap, Keng Chee and Dahari, A. Bakar (1984) Postpartum anoestrus in the suckled swamp buffalo. In: The Use of nuclear techniques to improve domestic buffalo production in Asia: the final research co-ordination meeting, 30 Jan.- 3 Febr. 1984, Manila, Philipines. . English
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Putra Malaysia
building	UPM Institutional Repository
collection	Online Access
language	English English
description	Postpartum anoestrus is a serious cause of infertility in the swamp buffalo. Our studies have revealed that it is due to a failure in the resumption of ovarian cyclicity. Parity was inversely related to the calving interval being longer in primiparous than multiparous suckled buffaloes. This effect may be partly due to the higher nutrient demands for growth as well as for lactation in the primiparous animal. The effects of suckling on ovarian and pituitary function of postpartum buffaloes were investigated with the aid of radioimmunoassays for progesterone and luteinizing hormone (LH) as well as rectal palpation and laparoscopic inspection of the ovaries. The incidence of postpartum anoestrus was higher in suckeld than non-suckled buffaloes. Weaning buffalo calves at 30 d post partum resulted in the resumption of normal ovarian cycles within 60 d post partum. LH release in response to a single injection of a synthetic gonadotropin releasing hormone (GnRH) indicated that pituitary responsiveness to GnRH was restored by Day 30 post partum in suckled buffaloes whereas anoestrous buffaloes were able to release levels of LH comparable to that of the preovulatory surge. A progesterone-releasing intra-vaginal device (PRID) induced an anovulatory oestrus in the anoestrous suckled buffalo which was partially overcome by human chorionic gonadotropin (HCG) administered at the induced oestrus. However, a 72 h separation of the calf from its dam combined with PRID was the most effective substitute to weaning in initiating ovarian cycles in the suckled buffalo. Our data suggest that suckling inhibits ovarian function not by an effect on the pituitary gland but rather on GnRH release by the hypothalamus.
format	Conference or Workshop Item
author	Sharifuddin, W. Jainudeen, Mohamed Razeen Yap, Keng Chee Dahari, A. Bakar
spellingShingle	Sharifuddin, W. Jainudeen, Mohamed Razeen Yap, Keng Chee Dahari, A. Bakar Postpartum anoestrus in the suckled swamp buffalo
author_facet	Sharifuddin, W. Jainudeen, Mohamed Razeen Yap, Keng Chee Dahari, A. Bakar
author_sort	Sharifuddin, W.
title	Postpartum anoestrus in the suckled swamp buffalo
title_short	Postpartum anoestrus in the suckled swamp buffalo
title_full	Postpartum anoestrus in the suckled swamp buffalo
title_fullStr	Postpartum anoestrus in the suckled swamp buffalo
title_full_unstemmed	Postpartum anoestrus in the suckled swamp buffalo
title_sort	postpartum anoestrus in the suckled swamp buffalo
publisher	IAEA
publishDate	1984
url	http://psasir.upm.edu.my/id/eprint/17899/ http://psasir.upm.edu.my/id/eprint/17899/1/ID%2017899.pdf
first_indexed	2018-09-07T13:58:06Z
last_indexed	2018-09-07T13:58:06Z
_version_	1610957388730335232

Postpartum anoestrus in the suckled swamp buffalo

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