Abstract:
This study was done on a batch of Suffolk beef sheep, acclimatized in Romania.. The success of an ET protocol in sheep
depends on many factors, but in the end, what matters is the number of embryos obtained. Embryo recovery (recovery
rate), after poliovulation (POV), is an essential step in ET. The aim of our experiment was to observe the ovarian reaction
(follicles –F, and corpora lutea-CL) to the treatment of Suffolk sheep polyovulation, The aim of our experiment was to
observe the ovarian reaction to the treatment of Suffolk sheep POV. A number of 3 Suffolk sheep were poliovulated at
the reproductive season, using P4-FSH-PGF protocol. The POV method was based on the administration of sponges
with intravaginal progesterone 12 days, followed by 500 IU FSH: LHp in decreasing doses in the last 4 days, and a PGF
on day 11. The poliovulatory ovarian response was monitored by transectal ultrasound, before estrus was detected, and
on the day 7. The ovulatory response following POV treatment was assessed by CL counting. In two out of three sheep,
CL was identified, despite the fact that they all had follicular growth, in sheep no. 2, no dehiscence occurred. The total
number of formations observed was 26 CL. The distribution of CL between the two right and left ovaries, in the three
cases examined was thus 8 CL on the right ovary and 7 CL on the left (in sheep 1), no CL in sheep 2 and 6/5 in sheep
no. 3. The POV response to FSH in the Suffolk breed was an average of 8.6 F/sheep of the developed follicles. Our goal
was in fact to follow the ovarian dynamics in these meat breeds, in order to apply the best treatment schemes, for
successfully apply embryo transfer.
