Gynaecological diagnosis by ultrasound and the measurement of urinary sex steroid hormones in female orangutans

Gynaecological diagnoses were carried in three adult female orangutans (Pongo spp.) using ultrasound, and their estrous states were estimated by measuring urinary sex steroid hormone concentrations using enzyme immunoassay. Ultrasound diagnosis revealed that the endometrial thickness and follicle si...

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Bibliographic Details
Published in:Veterinary medicine and science 2020-08, Vol.6 (3), p.612-616
Main Authors: Kinoshita, Kodzue, Nakamura, Tomoyuki, Kimura, Koichi, Shimizu, Mika, Kuze, Noko, Ozaki, Yasuhiko
Format: Article
Language:English
Subjects:
Anesthesia
Animals
Aquariums
Cervix
Chorionic gonadotropin
Diagnosis
Endometrium
Enzyme immunoassay
Estrogens
Estrus
Female
Females
Genitalia, Female - physiology
Gonadal Steroid Hormones - urine
Gonadotropins
Gynecology
Hormones
Menstruation
Monkeys & apes
oestrogen
Original
ovary
Ovulation
Physiology
Pituitary (anterior)
Pongo
Pongo - physiology
Pongo - urine
reproductive organ
Steroid hormones
Ultrasonic imaging
Ultrasonography - veterinary
Ultrasound
Uterus
Vagina
Zoos
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Summary:Gynaecological diagnoses were carried in three adult female orangutans (Pongo spp.) using ultrasound, and their estrous states were estimated by measuring urinary sex steroid hormone concentrations using enzyme immunoassay. Ultrasound diagnosis revealed that the endometrial thickness and follicle size were correlated with the oestrogen‐3‐glucuronide concentrations in the follicular phase. In addition, administration of the ovulation inducer human chorionic gonadotropin (hCG) had the strongest effect on the pregnanediol‐3‐glucuronide (PdG) concentration when the follicle size was 22.3 mm, suggesting that the follicle reaches this size before ovulation. The similarity between this and the maximum ovarian follicle size in humans (approximately 20 mm) indicates that the ancestral reproductive characteristics may have been retained in these species. In orangutans, endometrium thickness and follicle size were correlated with estrogen concentration. And follicle may increase to around 22.3 mm prior to ovulation. Orangutans and humans have similar reproductive physiology.
ISSN:2053-1095
2053-1095
DOI:10.1002/vms3.237