Relevant bibliographies by topics / Graafian follicle Physiology

Academic literature on the topic 'Graafian follicle Physiology'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Graafian follicle Physiology"

1

Flint, A. P. F. "Physiology of the Graafian Follicle and Ovulation." Veterinary Journal 167, no. 3 (May 2004): 301. http://dx.doi.org/10.1016/j.tvjl.2003.09.014.

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2

Sievert, Lynnette Leidy. "Physiology of the Graafian follicle and ovulation." American Journal of Human Biology 16, no. 2 (2004): 172–73. http://dx.doi.org/10.1002/ajhb.20004.

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3

Perven, Hosna Ara, Abu Sadat Mohammad Nurunnabi, and Shamim Ara. "Histomorphometric study of the follicles of the ovary in Bangladeshi women." Journal of Bangladesh Society of Physiologist 7, no. 2 (April 5, 2013): 89–93. http://dx.doi.org/10.3329/jbsp.v7i2.14458.

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Background: The accurate assessment of size and number of ovarian follicles are paramount to understanding the physiology of female reproduction. Objective: To observe the variation in size of the Graafian follicle and follicular number with age in Bangladeshi women. Methods: This descriptive type of study was done in the Department of Anatomy, Dhaka Medical College, Dhaka, from January to December 2009, on 140 post mortem human ovaries collected from 70 unclaimed female dead bodies from the morgue of Forensic Medicine, Dhaka Medical College, Dhaka. The samples were divided into three age-groups including group A (10-13 years), group B (14-45 years) and group C (46-52 years). 10 best prepared histological slides from 14-45 years age group were examined to determine the average size of Graafian follicle and 20 slides from each group were taken to determine the number of follicles. Results: The average diameter of the Graafian follicles of the right is slightly higher than that of the left ovary but not statistically significant (p>0.05). No difference was found in follicular number in between the right and the left ovaries at any age group. However, the difference in number of the follicles of the ovary were statistically significant in between age groups A & C and B & C (p<0.001). Conclusion: The average diameter of Graafian follicle was found greater in the right ovary than the left ovary. However, the number of ovarian follicles was found to decrease in old age. DOI: http://dx.doi.org/10.3329/jbsp.v7i2.14458 J Bangladesh Soc Physiol. 2012, December; 7(2): 89-93
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4

Eddy, Carlton A. "Hunter, R. H. F., editor. Physiology of the Graafian Follicle and Ovulation." Fertility and Sterility 81, no. 2 (February 2004): 484. http://dx.doi.org/10.1016/j.fertnstert.2003.10.011.

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5

Roozendaal, Marjolijn M., Hans JM Swarts, Victor M. Wiegant, and John AM Mattheij. "Effect of restraint stress on the preovulatory luteinizing hormone profile and ovulation in the rat." European Journal of Endocrinology 133, no. 3 (September 1995): 347–53. http://dx.doi.org/10.1530/eje.0.1330347.

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Roozendaal MM, Swarts HJM, Wiegant VM, Mattheij JAM. Effect of restraint stress on the preovulatory luteinizing hormone profile and ovulation in the rat. Eur J Endocrinol 1995;133:347–53. ISSN 0804–4643 Plasma profiles of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) were measured during restraint stress on the day of pro-oestrus; these profiles were considered in relation to ovulation rate on the next day. Rats bearing a permanent jugular vein cannula were subjected to restraint, which was started 0, 1 or 2 h before the presumed onset of the LH surge and ended just before the beginning of the dark period. Exposure to restraint resulted in a suppression of the secretion of both gonadotrophins on the day of pro-oestrus. Suppression of the LH surge was virtually complete (plasma LH ≤ 0.2 ng/ml) in 15 out of 32 stressed rats, and the ovaries of these rats contained graafian follicles with oocytes in germinal vesicle stage. In these rats, the LH surge did not occur 24 h later. In the remaining 17 rats, restraint resulted in a considerable suppression of the LH surge. Of these rats, five had an ovulation rate of 100% and four ovulated partially. In unruptured follicles of the latter, the oocyte had not resumed meiosis and the follicle wall was not luteinized. In the remaining eight rats with a reduced LH surge, ovulations had not occurred and graafian follicles were unaffected. The results of this study indicate that during pro-oestrus restraint stress suppresses and does not delay the release of preovulatory gonadotrophins. Partial suppression of LH by restraint does not result in induction of meiotic resumption without subsequent ovulation or in luteinized unruptured follicles. JAM Mattheij, Department of Human and Animal Physiology, Agricultural University, Haarweg 10, 6709 PJ, Wageningen, The Netherlands
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6

Mattheij, John AM, and Hans JM Swarts. "Induction of luteinized unruptured follicles in the rat after injection of luteinizing hormone early in pro-oestrus." European Journal of Endocrinology 132, no. 1 (January 1995): 91–96. http://dx.doi.org/10.1530/eje.0.1320091.

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Mattheij JAM, Swarts HJM. Induction of luteinized unruptured follicles in the rat after injection of luteinizing hormone early in pro-oestrus. Eur J Endocrinol 1995;132:91–6. ISSN 0804–4643 The cause of formation of luteinized unruptured follicles (LUF) is unknown. Formation of LUF was studied after injection of a varying small dose of luteinizing hormone (LH) with or without subsequent injection of gonadotrophin-releasing hormone (GnRH); in addition, the effect of suppression of prolactin on LUF formation was studied. Luteinization without ovulation occurred in virtually all graafian follicles, if 0.5–1.0 μg of LH was injected some hours before the presumed endogenous LH surge (suppressed by Nembutal); with increasing doses of LH progressively increasing numbers of ovulations were observed. If in early pro-oestrus 1 μg of GnRH was given 4 h after 1 μg of LH, formation of LUF was partly prevented; if the interval between LH and GnRH was 8 h or more, the great majority of graafian follicles developed into LUF. If early in pro-oestrus 1 μg of LH was given and 8 h later 0.1 μg of a potent GnRH analogue, about 50% of the follicles became LUF; in similarly treated rats, suppression of prolactin by ergocryptine reduced but did not prevent LUF formation. The data support the idea that deficient LH secretion in the period before ovulation may be involved in the formation of LUF. John AM Mattheij, Department of Human and Animal Physiology, Haarweg 10, 6709 PJ Wageningen, The Netherlands
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7

Manabe, Noboru, Yuzuru Imai, Akira Myoumoto, Yoshihiro Kimura, Miki Sugimoto, Yoshinori Okamura, Manabu Fukumoto, Kazuhiro Sakamaki, and Hajime Miyamoto. "Apoptosis Occurs in Granulosa Cells but not Cumulus Cells in the Atretic Graafian Follicles in Multiparous Pig Ovaries." Acta Histochemica et Cytochemica 30, no. 1 (1997): 85–92. http://dx.doi.org/10.1267/ahc.30.85.

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8

Loetz, E., and M. Rojas. "112 Follicular dynamics and oestrus response of Alpine goats with oestrus/ovulation synchronized during the early transitional reproductive phase using gonadotrophin given early or late." Reproduction, Fertility and Development 33, no. 2 (2021): 163. http://dx.doi.org/10.1071/rdv33n2ab112.

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Oestrus and ovulation synchronization (E/OS) regimens for fixed-timed breeding are useful when consistently eliciting ovulation. Early synchronization in the reproductive season promotes unreliable oestrus behavioural and physiologic response due to insufficient ovarian priming. In ruminants, equine (eCG) or human chorionic gonadotrophin (hCG) has FSH bioactivity or elicits ovulation, correspondingly. Hence, 120 and 60IU of eCG and hCG, respectively, are included in goat E/OS regimes. This experiment addresses the time when eCG/hCG (CG) is given relative to progestagen (P4) withdrawal and its effect on oestrus and ovulation. Fourteen non-lactating, Alpine breed goats, ranging from 1 to 6 kiddings, averaging±s.d. 3.9±2.0 years of age, and 56.3±5.0kg of bodyweight (BW), and body condition score (BCS) of 2.6±0.2, were evaluated early in the transitional reproductive phase (12h daylight:12h darkness). E/OS was accomplished with 12 day of P4 (200 mg) exposure by intravaginal insert. Three treatments were evaluated: Traditional (T; n=4) did not receive CG and served as the control group; early (E; n=5) received CG 24h before P4 removal; and reverse (R; n=5) received PGF2α 24h before P4 withdrawal as well as CG concurrent with P4 withdrawal. Oestrus response to E/OS was evaluated 24h after breeding using epididymectomized bucks. Ovaries were scanned by transrectal ultrasound (Aloka SSD-500V/7.5-MHz linear array probe) for 4 consecutive days starting with the first i.m. injection of 1.0mL of PGF2α or 1.5mL of CG. Images were digitized (MediCapture™) for later morphometry. The absence of effect (P&gt;0.05) from concomitant variables age, BW, BCS, and parity was ascertained using a logistic regression model (JMP/SAS v15; SAS Institute Inc.). Ovulation, defined as the disappearance of the largest (&gt;7mm) preovulatory follicle on a subsequent observation, was 100, 80, and 100%; and the average±s.e. number of ovulations per goat was 2±0.41, 1±0.32, and 1.3±0.49 (P&gt;0.05). Table 1 summarises follicular size documented of 122 observations of ovulatory areas. Graafian follicle location was not different for left or right ovaries (P&gt;0.05). Oestrus behavioural response to each E/OS treatment (T, E, or L) up to 24h after P4 removal was 50, 80, and 80% (P&gt;0.05), respectively. In summary, oestrus response and ovulation were not affected by the variables studied. In this experience the timing of CG was not relevant. Table 1. Mean diameter (±SE; mm) of nonovulatory and preovulatory follicles on left (L) and right (R) ovaries E/OS protocol Non- and preovulatory Nonovulatory Preovulatory L R L R L R Traditional 6.4±0.6 5.5±0.6 4.8±0.4 4.5±0.4 7.7±0.4 8.9±0.3 Early 5.2±0.3 5.5±0.4 4.9±0.2 4.4±0.3 8.4±1.2 8.1±0.2 Reverse 6.6±0.5 5.3±0.6 5.1±0.4 4.4±0.5 8.7±0.3 8.1±0.2 Overall 5.7±0.19 4.7±0.14 8.3±0.14
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9

Loetz, E., and M. Rojas. "112 Follicular dynamics and oestrus response of Alpine goats with oestrus/ovulation synchronized during the early transitional reproductive phase using gonadotrophin given early or late." Reproduction, Fertility and Development 33, no. 2 (2021): 163. http://dx.doi.org/10.1071/rdv33n2ab112.

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Oestrus and ovulation synchronization (E/OS) regimens for fixed-timed breeding are useful when consistently eliciting ovulation. Early synchronization in the reproductive season promotes unreliable oestrus behavioural and physiologic response due to insufficient ovarian priming. In ruminants, equine (eCG) or human chorionic gonadotrophin (hCG) has FSH bioactivity or elicits ovulation, correspondingly. Hence, 120 and 60IU of eCG and hCG, respectively, are included in goat E/OS regimes. This experiment addresses the time when eCG/hCG (CG) is given relative to progestagen (P4) withdrawal and its effect on oestrus and ovulation. Fourteen non-lactating, Alpine breed goats, ranging from 1 to 6 kiddings, averaging±s.d. 3.9±2.0 years of age, and 56.3±5.0kg of bodyweight (BW), and body condition score (BCS) of 2.6±0.2, were evaluated early in the transitional reproductive phase (12h daylight:12h darkness). E/OS was accomplished with 12 day of P4 (200 mg) exposure by intravaginal insert. Three treatments were evaluated: Traditional (T; n=4) did not receive CG and served as the control group; early (E; n=5) received CG 24h before P4 removal; and reverse (R; n=5) received PGF2α 24h before P4 withdrawal as well as CG concurrent with P4 withdrawal. Oestrus response to E/OS was evaluated 24h after breeding using epididymectomized bucks. Ovaries were scanned by transrectal ultrasound (Aloka SSD-500V/7.5-MHz linear array probe) for 4 consecutive days starting with the first i.m. injection of 1.0mL of PGF2α or 1.5mL of CG. Images were digitized (MediCapture™) for later morphometry. The absence of effect (P&gt;0.05) from concomitant variables age, BW, BCS, and parity was ascertained using a logistic regression model (JMP/SAS v15; SAS Institute Inc.). Ovulation, defined as the disappearance of the largest (&gt;7mm) preovulatory follicle on a subsequent observation, was 100, 80, and 100%; and the average±s.e. number of ovulations per goat was 2±0.41, 1±0.32, and 1.3±0.49 (P&gt;0.05). Table 1 summarises follicular size documented of 122 observations of ovulatory areas. Graafian follicle location was not different for left or right ovaries (P&gt;0.05). Oestrus behavioural response to each E/OS treatment (T, E, or L) up to 24h after P4 removal was 50, 80, and 80% (P&gt;0.05), respectively. In summary, oestrus response and ovulation were not affected by the variables studied. In this experience the timing of CG was not relevant. Table 1. Mean diameter (±SE; mm) of nonovulatory and preovulatory follicles on left (L) and right (R) ovaries E/OS protocol Non- and preovulatory Nonovulatory Preovulatory L R L R L R Traditional 6.4±0.6 5.5±0.6 4.8±0.4 4.5±0.4 7.7±0.4 8.9±0.3 Early 5.2±0.3 5.5±0.4 4.9±0.2 4.4±0.3 8.4±1.2 8.1±0.2 Reverse 6.6±0.5 5.3±0.6 5.1±0.4 4.4±0.5 8.7±0.3 8.1±0.2 Overall 5.7±0.19 4.7±0.14 8.3±0.14
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10

Fernandez-Pardal, J., M. F. Gimeno, and A. L. Gimeno. "The efflux from and the metabolism of 3H-norepinephrine in sow graafian follicles. Variable involvement of some prostaglandins during two different stages of the sex cycle." Prostaglandins, Leukotrienes and Medicine 19, no. 1 (July 1985): 1–10. http://dx.doi.org/10.1016/0262-1746(85)90156-8.

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Dissertations / Theses on the topic "Graafian follicle Physiology"

1

Redding, Gabe Peter. "Oxygen and the ovarian follicle : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Bioprocess Engineering at Massey University, Palmerston North, New Zealand." 2007. http://hdl.handle.net/10179/1394.

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The role oxygen plays in the developing ovarian follicle is of interest not only to the field of developmental biology but also to in-vitro fertilisation (IVF) technologists, as oxygenation of the oocyte is considered to be a potential determinant of oocyte competence. Oxygen transport through the developing ovarian follicle, and practical aspects of the analysis of oxygen in human follicular fluid were investigated in this work. Mathematical modelling of oxygen transport in the pre-antral, and antrallpreovulatory follicle revealed a number of interesting findings, Contrary to previous conclusions (Gosden & Byatt-Smith, 1986), oxygen can reach the oocyte in the small pre-antral follicle. Improved estimates of diffusion coefficients through the granulosa cell layer and the inclusion of fluid voidage in this layer showed that oxygen can also reach the oocyte in large pre-antral follicles. The amount of oxygen that reaches the oocyte in the pre-antral follicle is a function of its size and degree of vascularisation. Symmetrically distributed vascularisation is superior in achieving a well oxygenated follicle. However, the large pre-antral follicle will eventually reach a size beyond which it cannot grow without anoxic regions developing. The size at which this occurs is consistent with the size at which antrum formation is observed in human follicles. The model predicts that the follicle can avoid an anoxic state through antrum formation, and shows that the follicle develops in a way that is consistent with overcoming mass transport limitations. The oxygen status of the follicle during the antrallpre-ovulatory phase of growth requires that the volume of granulosa cells be balanced by the volume of follicular fluid. Further predictions suggest that oocyte respiration becomes sub-maximal at follicular fluid volumes below approximately 4m1, vascularisation levels below 38%, or fluid i dissolved oxygen levels below 5.1 ~01%. These values are consistent with observations in the literature. It was also shown that the measurement of follicular fluid dissolved oxygen levels could provide a simple measure of the respiratory status of the oocyte, and this may be superior to the measurement of follicular vascularisation which requires knowledge of more parameters. Methodology for the analysis of follicular fluid oxygen solubility and diffusivity was developed using a Clark oxygen electrode. Analysis of these parameters showed that they are similar to human plasma, and allowed the predictive uncertainty of the model to be reduced. Experimental studies into the effects of IVF aspiration on follicular fluid were carried out. Aspiration results in significant changes in the properties of follicular fluid. Dissolved oxygen levels rose 5 * 2 vol%, pH increased by 0.04 * 0.01 pH units, and temperature dropped by 7.7 * 1.3 "C. Mathematical modelling of blood contaminated follicular fluid also showed that contamination results in significant changes in the dissolved oxygen of the fluid. This suggests that if the composition of follicular fluid is to be determined (particularly dissolved oxygen), sampling andlor measurement of fluid must take place before the collection vial of the aspiration kit, and blood contamination must be eliminated. Based on this result, the design and testing of devices capable of reliable sampling andlor rneasurement of oxygen levels of follicular fluid was considered. This presents a continuing challenge, including the integration of routine follicular fluid oxygen measurement into clinical practice.
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Books on the topic "Graafian follicle Physiology"

1

Hunter, R. H. F. Physiology of the Graafian follicle and ovulation. Cambridge, UK: Cambridge University Press, 2003.

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Biology of ovarian follicles in mammals. Berlin: Springer-Verlag, 1985.

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Ovarian follicles in reptiles and birds. Berlin: Springer-Verlag, 1989.

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Symposium on Animal Reproduction (18th 1987 Utah State University). XVIII Biennial Symposium on Animal Reproduction: Physiology of the ovarian follicle, July 28, 1987, Utah State University, Logan. Edited by Woody Charles O. [S.l.]: American Society of Animal Science, 1988.

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Primate Ovary Symposium (1987 Beaverton, Or.). The primate ovary. New York: Plenum Press, 1987.

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Hunter, R. H. F. Physiology of the Graafian Follicle and Ovulation. Cambridge University Press, 2011.

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The Primate Ovary (Serona Symposiausa). Springer, 1988.

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