LH and FSH secretion, follicle development and oestradiol in sows ovulating or failing to ovulate in an intermittent suckling regimen

P. Langendijk, S.J. Dieleman, C. van Dooremalen, G.R. Foxcroft, R. Gerritsen, W. Hazeleger, N.M. Soede, B. Kemp

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Abstract

The present paper describes LH and FSH secretion, follicle development and ovulation in sows that were subjected to a limited nursing regimen. From Day 14 of lactation, 32 sows were separated from their piglets for 12 h every day (intermittent suckling; IS). Half the sows had boar contact during separation. Nine of 32 sows ovulated spontaneously within 14 days from initiation of IS. The frequency of LH pulses on the first day of IS tended to be higher in anovulatory sows (6.3 v. 4.2 pulses per 12 h; P <0.10); other characteristics of LH secretion were similar to sows that ovulated. The characteristics of FSH secretion did not differ over the 8-h sampling period. Boar contact did not influence either LH and FSH secretion or the number of sows that ovulated. Up to 58% of anovulatory sows showed an increase in follicle size after initiation of IS and, 4 days after the initiation of IS, one-third still had follicles similar in size to those in ovulatory sows. However, the oestradiol concentration in anovulatory sows did not increase. We conclude that FSH and LH stimulation in anovulatory sows is not limiting for normal follicle development, but that ovarian follicles are not responsive to increased LH secretion
Original languageEnglish
Pages (from-to)313-322
JournalReproduction Fertility and Development
Volume21
Issue number2
DOIs
Publication statusPublished - 2009

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Ovarian Follicle
Ovulation
suckling
Lactation
sows
estradiol
Estradiol
Nursing
secretion
boars
breast feeding
ovarian follicles
ovulation
piglets
lactation

Keywords

  • luteinizing-hormone
  • primiparous sows
  • stimulating-hormone
  • lactating sows
  • litter separation
  • boar exposure
  • feeding level
  • estrus
  • expression
  • prolactin

Cite this

@article{5c0237463acb45a4956a7da33ac27fcb,
title = "LH and FSH secretion, follicle development and oestradiol in sows ovulating or failing to ovulate in an intermittent suckling regimen",
abstract = "The present paper describes LH and FSH secretion, follicle development and ovulation in sows that were subjected to a limited nursing regimen. From Day 14 of lactation, 32 sows were separated from their piglets for 12 h every day (intermittent suckling; IS). Half the sows had boar contact during separation. Nine of 32 sows ovulated spontaneously within 14 days from initiation of IS. The frequency of LH pulses on the first day of IS tended to be higher in anovulatory sows (6.3 v. 4.2 pulses per 12 h; P <0.10); other characteristics of LH secretion were similar to sows that ovulated. The characteristics of FSH secretion did not differ over the 8-h sampling period. Boar contact did not influence either LH and FSH secretion or the number of sows that ovulated. Up to 58{\%} of anovulatory sows showed an increase in follicle size after initiation of IS and, 4 days after the initiation of IS, one-third still had follicles similar in size to those in ovulatory sows. However, the oestradiol concentration in anovulatory sows did not increase. We conclude that FSH and LH stimulation in anovulatory sows is not limiting for normal follicle development, but that ovarian follicles are not responsive to increased LH secretion",
keywords = "luteinizing-hormone, primiparous sows, stimulating-hormone, lactating sows, litter separation, boar exposure, feeding level, estrus, expression, prolactin",
author = "P. Langendijk and S.J. Dieleman and {van Dooremalen}, C. and G.R. Foxcroft and R. Gerritsen and W. Hazeleger and N.M. Soede and B. Kemp",
year = "2009",
doi = "10.1071/RD06172",
language = "English",
volume = "21",
pages = "313--322",
journal = "Reproduction Fertility and Development",
issn = "1031-3613",
publisher = "CSIRO Publishing",
number = "2",

}

LH and FSH secretion, follicle development and oestradiol in sows ovulating or failing to ovulate in an intermittent suckling regimen. / Langendijk, P.; Dieleman, S.J.; van Dooremalen, C.; Foxcroft, G.R.; Gerritsen, R.; Hazeleger, W.; Soede, N.M.; Kemp, B.

In: Reproduction Fertility and Development, Vol. 21, No. 2, 2009, p. 313-322.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - LH and FSH secretion, follicle development and oestradiol in sows ovulating or failing to ovulate in an intermittent suckling regimen

AU - Langendijk, P.

AU - Dieleman, S.J.

AU - van Dooremalen, C.

AU - Foxcroft, G.R.

AU - Gerritsen, R.

AU - Hazeleger, W.

AU - Soede, N.M.

AU - Kemp, B.

PY - 2009

Y1 - 2009

N2 - The present paper describes LH and FSH secretion, follicle development and ovulation in sows that were subjected to a limited nursing regimen. From Day 14 of lactation, 32 sows were separated from their piglets for 12 h every day (intermittent suckling; IS). Half the sows had boar contact during separation. Nine of 32 sows ovulated spontaneously within 14 days from initiation of IS. The frequency of LH pulses on the first day of IS tended to be higher in anovulatory sows (6.3 v. 4.2 pulses per 12 h; P <0.10); other characteristics of LH secretion were similar to sows that ovulated. The characteristics of FSH secretion did not differ over the 8-h sampling period. Boar contact did not influence either LH and FSH secretion or the number of sows that ovulated. Up to 58% of anovulatory sows showed an increase in follicle size after initiation of IS and, 4 days after the initiation of IS, one-third still had follicles similar in size to those in ovulatory sows. However, the oestradiol concentration in anovulatory sows did not increase. We conclude that FSH and LH stimulation in anovulatory sows is not limiting for normal follicle development, but that ovarian follicles are not responsive to increased LH secretion

AB - The present paper describes LH and FSH secretion, follicle development and ovulation in sows that were subjected to a limited nursing regimen. From Day 14 of lactation, 32 sows were separated from their piglets for 12 h every day (intermittent suckling; IS). Half the sows had boar contact during separation. Nine of 32 sows ovulated spontaneously within 14 days from initiation of IS. The frequency of LH pulses on the first day of IS tended to be higher in anovulatory sows (6.3 v. 4.2 pulses per 12 h; P <0.10); other characteristics of LH secretion were similar to sows that ovulated. The characteristics of FSH secretion did not differ over the 8-h sampling period. Boar contact did not influence either LH and FSH secretion or the number of sows that ovulated. Up to 58% of anovulatory sows showed an increase in follicle size after initiation of IS and, 4 days after the initiation of IS, one-third still had follicles similar in size to those in ovulatory sows. However, the oestradiol concentration in anovulatory sows did not increase. We conclude that FSH and LH stimulation in anovulatory sows is not limiting for normal follicle development, but that ovarian follicles are not responsive to increased LH secretion

KW - luteinizing-hormone

KW - primiparous sows

KW - stimulating-hormone

KW - lactating sows

KW - litter separation

KW - boar exposure

KW - feeding level

KW - estrus

KW - expression

KW - prolactin

U2 - 10.1071/RD06172

DO - 10.1071/RD06172

M3 - Article

VL - 21

SP - 313

EP - 322

JO - Reproduction Fertility and Development

JF - Reproduction Fertility and Development

SN - 1031-3613

IS - 2

ER -