Ovarian and Oocyte Morphology During the Spring-Summer and Fall-Winter in Queens (Felis catus) Kept in a Tropical Climate.

The objective of this study was to investigate the effects of seasonality and phase of the estrous cycle on ovarian and oocyte morphology in domestic cats kept in a tropical region. The ovaries from 23 queens were collected after elective ovariohysterectomy at different stages of the estrous cycle and were classified according to the season upon collection (spring/summer vs. fall/winter).

Ovarian blood vessel occlusion as a surgical sterilization method in rats.

Purpose: To evaluate the female sterilization by occlusion of the ovarian blood flow, using the rat as experimental model.

Methods: Fifty-five females rats were divided into four groups: I (n=10), bilateral ovariectomy, euthanized at 60 or 90 days; II (n=5), opening the abdominal cavity, euthanized at 90 days; III (n=20), bilateral occlusion of the ovarian blood supply using titanium clips, euthanized at 60 or 90 days; and IV (n=20), bilateral occlusion of the ovarian blood supply using nylon thread, euthanized at 60 or 90 days. The estrous cycle was monitored by vaginal cytology.