Ultrasonographic appearance of the ovary and uterus of the bitch during oestrus, ovulation and early pregnancy.

摘要: The ovaries and uteri of ten bitches were imaged daily from the onset pro-oestrus until 30 days after plasma surge luteinizing hormone. During small follicles increased in size but did not protrude above surface ovary. Ovulation was characterized by a decrease number fluid-filled their replacement with similarly sized hypoechoic structures. These structures declined ovulation replaced corpora lutea. Gradual thickening wall corpus luteum occurred subsequent obliteration central anechoic cavity. oestrus there an increase transverse diameter uterus, which developed characteristic appearance radiating areas hyperechogenicity zones hypoechogenicity. uterine changes considered to be specific enough used as indication ovulation. Uterine echogenicity differ between pregnant non-pregnant gestational sacs identified, mean 18.6 +/- 0.9 (SD) Embryonic tissue heart beats first detected 23 27 pre-ovulatory hormone surge.