Abstract
Changes in time lapse in various genital organs at induced estrus of 125 pre-puberal guts following administration of 500IU of PMSG and 500IU of HCG were investigated in the present study.
In the development of estrus signs following GTH administration, changes in redness and swelling of genital organs were noted as time advanced, but dorsal pressure reaction was developed in 5.9% of the animals.
As to the relationship between the induced estrus and the ovarian cycle following GTH administration, correlation was noted: 77.8% and 87.5% were at the early follucular stage on days 1 and 2 after GTH administration, while 64.7% was at the late, follucular stage on day 3. At days 4 and 5, 54.5% and, 93.3% were at their ovulation stage.
At days 6 and 10, 98.9% were at the early luteal stage and 83.3% were at the middle luteal stage, respectively.
Of the morphological changes of various genital organs in time lapse following GTH administration, significant differences (P<0.01) were found out in the weights of oviduct, uterus, cervix, vagina and vaginal vetibule between varying stages of determinations.
The weights of genital organs of pigs with induced estrus after GTH administration were greater than those before it, i. e. 4.3 times greater in uterus, 2.7 times in oviduct, 2.1 times in cervix, 2 times in vagina and, 1.6 times in vaginal vestibule.
