1¾ « { Date: Mon, 6 Apr 1998 11:00:13 +0100
From: Jin-Gui Gong
Subject: RE: bST and its effect in superovulation of sheep
>Dear members,
>I am doing a study on superovulation of ewes. So far, there seems to no
>significant effect when bST was used in conjunction with superovulation
>of ewes i.e. in term of ovulation rate. Is there anybody who can advice
>me the best way to scan ovary for follicular study using a real-time
>ultrasonography?
>Thanks in anticipation.
>Rashid
>Malaysia
>
>
I am not surprised to learn that bST didn't seem to affect the superovulatory
response in ewes in terms of ovulation rate. Several studies (Gong et al.,
Anim. Reprod. Sci. 1996, 41: 13-26; Eckery et al., J. Anim. Sci. 1994, 72:
2425-2430; Joyce et al., J. Reprod. Fertil. Abstract Series 1996, 17: abstract
33) have already shown that bST treatment does not increase total number of
antral follicles and/or superovulatory response in ewes. This is unlike in
cattle where bST can increase the total number of antral follicles and
therefore pretreatment with bST significantly enhances superovulatory
response (Gong et al., Theriogenology 1996, 45: 611-622). Nevertheless,
bST might still have an effect on the quality of response (in terms of
transferability of embryos recovered) in ewes, as already demonstrated in cattle
(Kuehner et al., Theriogenology 1993, 40: 1003-1013; Gong et al., Theriogenology
1996, 45: 611-622). Has anybody looked at this in ewes already?
Jin Gong
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Dr. Jin G. Gong
Division of Development and Reproduction
Roslin Institute
Roslin
Midlothian EH25 9PS
United Kingdom
Telephone: <44> (0131) 5274321
Fax: <44> (0131) 4400434
E-mail: jin-gui.gong@bbsrc.ac.uk
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1996€ { w { B € } ÿÿ { B Albertus Extra Bold icantly enhances superovulatory
response (Gong et al., Theriogenology 1996, 45: 611-622). Neverthel